What are the restrictions on posting messages with an application on Facebook?

Question

Facebook

The situation is this:
Let's say there is a site "somesite.com". You can enter the site using your FB account, after you give the necessary rights to the “somesiteapp” application. The application also asks the user for permission to post on his behalf to friends.
Further, when the user "Pupkin" logs into the site, this application will post notifications to X friends on the wall (only once each) that their friend "Pupkin" has signed up to "somesite.com".
Attention question:
1. How many friends can post a notification. 5? ten? 100? What limits ...
2. There can be many such Pupkins per day. Is there a general limit on the number of notifications that "somesiteapp" will make per day?
3. How does the FB relate to the above scheme. Is it legitimate or does he regard it as spam?
Thanks in advance, honestly I googled, but I did not find the answers so far.

Answer 1

For God's sake, do not translate application as an application. "Application" is translated into English as "Appliqué".
en.wikipedia.org/wiki/Application
en.wikipedia.org/wiki/Appliqué _

Answer 2

For God's sake, if you have nothing to say on the subject matter, go somewhere else. Instead of an answer, I put a minus, thanks, it helps a lot.

Answer 3

On Habré, the difference between the attitude towards those who ask questions in RuNet and on English-language resources has been discussed more than once. A visual demonstration is visible above - the answer to the question has not been received, but the mind was taught the mind and the minuses were stuck. So that the next person with a similar question does not run into the same attitude, here are the answers that I received on English-language sites from adequate people (they are not official, but based on experience and trials):
1. Limit on "feed posts" for one user (made by the application) is 24 messages for 48 hours
2. There is no limit on messages from the application, only for the user
3. FB, most likely, will regard as spam posting on the walls of friends
As a result, we made posting only on the wall of the user himself, who gave consent to this. 10 days, normal flight