There's a list given by other members and it is highly appreciated for sure if you take a look if it by that next is check out the ideal platform to you like have a good rtp, bonuses, free spins and especially the airdrop, also stake has its free give away but not just a large amount that you expect, also there's a lot of exchange too like the coinmarketcap having an airdrop to its users that you can use for playing.
That is great advice my friend, of course it should be noted that now the Airdrops are not like before, they are very small in terms of the reward, if we put everything that has to be done in context, it is a lot of work with respect to what what is going to be won, apart from everything I think now they are doing a raffle to see if they come out with enough luck to receive their tokens, which means that, when you start working for the Airdrop there is a probability that they will not give you the reward, because if you don't come out in the draw you lose everything that is done, one day I did it and I was lucky because I was drawn, but when the airdrop arrived it wasn't even 1 USD.
Even few thousands of satoshi isn't too bad, as for me. But ofc if you're using freebitco.in on regular and this is you main casino\sportbook 
