I've seen advice that you shouldn't upvote anyone's post for at least an hour after it's published.

I think that's advice on swimming after eating.

The design of Steemit was that if someone votes before 30 minutes (not 60), part of the curation reward goes to the author of the post. I'm not certain if that still holds true, but it certainly did.

After the 30 minutes, if you upvote a post, then you would get the whole portion of whatever share of the 25% is due to you.

The 4 posts a day rule has been retired now. It was true but isn't now.

No penalties, but I have to agree, it could be seen as annoying. The only penalty I can think you'd incur for that, however, is that you'd not get as many followers as you possibly would.

Rather than 'slamming up' 22 posts, the person would have been better advised to post three or four quality posts and leave the rest for another day, giving himself time to edit and re-write the three or four he put up and make them really good instead of a whole lot in one go.

You can find the guidelines in the white paper if you look.

Or Here

I make no guarantees for that download. I didn't put it up, I just searched for Steemit White Paper and I've copied the first link that popped up.