Earlier quoted context omitted.
If it hasn't been mentioned, you should learn from the social media app Path. It limited the amount of friends you could have. As a result, people didn't add friends because they didn't want to give up a space for a potential future connection. The scarcity worked against Path. You might find the same result where people won't post because they'll be afraid of using up their allotment when they may have a better one…
Thanks, that's a good tip! I'll definitely check them out. And yup, definitely a concern. Makes me think that perhaps there's a possibility to not cap the posts, but rather have any posts outside of the first one in a week have something like a "secondary" tag. Then again, you might run into the problem that Instagram has where everyone stopped posting as soon as stories caught on. Alas, it's a tricky problem.
Say I post something about my weekend on Monday, it could be important about the loss of a family member or the birth of a child. Maybe I don't want to wait a number of days for that to appear on someone's feed...
But I could also post something new later that week. If it was consolidated into a weekly post it'd end up more like a digest at the end, and someone logging into the social network on Friday would see everything that happened to me so far that week.
It's a play on some of the ideas others have had, but the trick is timing. If my posts are digested to a weekly summary, it's going to reduce incentives for anyone to log in and use the platform on any day but "post day". Additionally if I'm free on Friday to spend time on there, but your new digest won't be posted until Saturday, I'm going to miss everything that's happened to you all week.