I believe daily announcements should be avoided. For one, it can be annoying to readers if they're constantly getting notifications about random stuff that have nothing to do with the series or creating or events. Posting random stuff should only happen once in a while, not every blipping day.
Also, kind of like the boy who cried wolf, the more your posts have little importance (in accordance to the amount you do per week) the less people will pay attention. So if you have something going on, post less, so that your followers will actually consider looking at it and maybe interact with it, rather than just thinking, "oh, it's probably another livestream notification." and not look at it at all.
So I would say, put some thought into your wall posts, because some of your followers get tons of notifications. If you don't like getting needless notifications, then your followers even more.
I've actually lost some subscribers because of this. Even if they like your content, they might unsubscribe if they keep getting too many notifications from you. I've done it myself before. I really didn't want to, but all of those notifications got annoying after a while.