Notifications/Invite cap on facebook applications - facebook

What is the notification/invite limit for a facebook app in a day or is there any cap at all?

Goto the diagnostics tab in you app insights and you'll see at the bottom a table named Feature Limits. The default limit for an application is something like 50 per user, per day and it is recalculated according to user feedback (how many users accept the requests sent,how many blocked your app, etc...).

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what is the maximum number of photo one instagram supports

The question is just the subject.
I am thinking of creating an app that pushes all the images from my phone to an Instagram account, which will keep the pictures in a private state.
So essentially that will replace the subscription alternative of google photos.
PS: It is fine to use Instagram or facebook,
The reason being the meta software will also help me face detect users of my friends, and create a ai generated commentary of my pictures that will help me organize and sort picture.
I don't think there is a strict limit for instagram on the 'maximum' number of images you can upload to the platform.
However there appears to be a maximum of 100 uploads limit per user in a 24 hours period, but bare in mind that if whatever you are trying to do is done in bulk and frequently over time and exceeds the limit may make you look like a bot, which may resulting your account gets banned immediately.

Restrict number of application users in Facebook app

Is it possible to limit the total number of user installs of a Facebook application using Facebook API or configuration?
Obviously the beauty of Facebook's platform is the virality. However, the greater the number of installations the more server demands grow etc.
So when building applications for clients with fixed budgets (think marketing activity / capping adverts per day based on spend) - is there a way to restrict the total number of users that Facebook allows to install an application?
Specifically talking here about building Facebook Games.
No, there is no build-in mechanism for that – because usually developers are happy about an ever-growing user base.
A canvas app is not really “installed”, users just connect to it. And this is the only point where you could try to handle this – once a user has connected to your app, you can recognize that (via the signed_request parameter or using the JS SDK) when he visits your app next time. So from a certain point on you could just not ask users for login any more (FB.login, redirecting them to the Auth dialog, …).
Obviously your initial app page will still be called, but any stuff you do afterwards with connected users and their data (if that’s what strains your little server most) you could just stop for users that are not already connected. Big downside of this is of course, if a user removes your app (willingly or by accident), they will find no way to re-connect with your app again.
Maybe you should consider hosting your app on a platform like Heroku – it’s free, and I think they will provide you with enough server power to handle your app growing larger than initially planned/expected.

Open Graph publish limits

I am creating a Facebook Open Graph action for my app, that has a potential of being published many times for each user (e.g, each time a user listens to a song on the site).
For some users, I may have hundreds of such actions per session or per day.
Question is - does Facebook pose limits on how many times an app publishes Open Graph actions? Obviously, Facebook will not show all those actions on feeds, and will probably show just the first ones, if any. But is it the application's responsibility to throttle the publishing, or is it encouraged to publish the real amount of actions?
If the app should throttle, what is a reasonable number of actions per user per day?
Publish everything. We will take care of the aggregation.

App insights drop for all games on 14-15th Sept?

I noticed that across all of my facebook apps there was a significant drop in users between 14th-15th September. After spending some time investigating any possible cause (as I had launched an update that day), and finding nothing, I looked on appdata.com and it seems that almost every game has this big drop on the same dates.
I have checked the blog and couldn't see anything obvious to say why this might be. Does anyone know the cause of this change in insights data? Or is this a bug?
They changed the way that the number of active users was calculated. According to here:
Facebook has changed the way it calculates the total monthly and daily active users (MAU and DAU) for apps on the social network, sending figures plummeting.
The adjustment means that users who choose not to authenticate after a permission dialog box is clicked, and those who visit an app but do not log in, will no longer be contribute towards active user counts.
As a result of the changes, some games have seen more than half of their previously reported user figures drop away (though these changes have made no difference to the actual traffic each game sees).
facebook changed how user's bookmarks appear on sept 13th, which meant that a lot of users that used to see your bookmark on the left side of their homepage no longer could. As of that date facebook seems to use way less space to list bookmarks, only showing bookmarks for apps you use a lot or have just used. The only way to counter this is to educate your users to set the bookmark for your app as a favorite, which gives that bookmark a permantent position (hopefully) forever in the top section of the left margin of their homepage.

facebook app, submiting and using of same app in several pages

i have an app that i want to submit so i will be able to use in a client page/business profile. i need 5 total users and for some reason that people that open the app didn't count in for the total users.... is there something needed to be done in order for them to count.
second question is... if i will have an app for a specific page, is it possible (and how?) to have that same page do different thing with a variable in the query for each client tab we will have in the feature?
Update:
I don't want users - i want to use the app in the page tabs!
by "that people that open the app didnot count in for total users" i mean that the total user count is not going up