There is https://free.bitcoin.com/, and anyone that wish can set up a topic which is "free sat for newcomers" post. The challenge with having it automatic is that there are no require-
ments to just creating an account on the fly, which is pretty nice since there is no incentive to make a bunch of accounts. But as soon as there is an economic incentive it needs to -
make it a bit more tedious to sign up. The minimum sensible starting amount would be around 1000 sat for people to post their first couple comments.
