Spam protection & income for read.cash (a suggestion)

I hope read.cash can become a self-sustaining platform with high quality content.
What I'd prefer to avoid is that low quality spam gets posted here just to flood the place. So here goes my suggestion:

Make the first post by an author within a 24-hour period free of charge.

For subsequent posts, start charging the authors $0.10 more for each one, so $0.10 for the 2nd post, $0.20 for the 3rd one etc.
The figures are only a suggestion, and might be adjusted up or down a bit.

This would provide a first line of defense against spam on the platform.
Authors who frequently post good content that gets tipped should have no problems keeping to their frequent posting, and it would generate a small bit of income for the platform itself.

AFAIK another platform (can't remember whether it was Yours.org or honest.cash) introduced a mandatory charge per post. I think it was relatively well accepted, at least I didn't see a big outcry. I still think having free posting as long as it's somewhat rate-limited, is preferably because some people might want to post good content without having any Bitcoin Cash, and it's better for adoption to give that benefit of the doubt to new users.

Spammers might circumvent and abuse this by registering more accounts in order to post at no cost.

That is a more difficult problem to tackle, but ultimately it should be manageable through UI features that let users prioritize content according to various criteria such as "has been tipped a lot", "has been tipped or commented by people in my list of accounts I've subscribed to", etc.

Anyway, interested to hear what this community thinks about the subject.