I don't remember exactly how long, but it must have been a while since we allowed infinite freebie posts as long as the fee would only be 1 sat. The idea was that they couldn't spam since following posts will cost 10x more for 10 minutes. But there might be a loophole in the fee escalation algorithm since our last update to it -- for example, by just commenting on a different post.

Also, in case someone didn't know: Freebie posts are only visible to stackers who enabled greeter mode. It is off by default.

Before our changes to the amount, it was 5 freebie comments and 3 freebie posts (no matter the cost iirc) .