Do they give out free btc?
You can see a list of distributions sent out to seat owners here: https://nastyfans.org/distribution.summary.csv
Distributions come from mined coins and donations. I don't consider that free BTC. NastyFans just distributes that mined and donated BTC to the seats. It's a pretty simple and straightforward concept.
No. Never. This is literally the longest running ponzi left in the btc space. 
You are literally an idiot. All distributed coins come from mined coins or donations. Anyone who purchases a seat is purchasing that seat from another member. No funds from seat transfers are paid out as distributions so it is very clearly not a Ponzi scheme and that is a provable fact easily verifiable on the blockchain. It's really simple to understand, so at this point you have to assume that owlcatz is financially illiterate or dishonest.