Almost all of the gambling sites offer a faucet to let you try their site.
But none of them would offer a high amount os free crypto currencies,
If you want you could try
Stake they accept plenty of crypto on their platform and have faucets for
BTC and other crypto as well,
They also have so many games on their site and plenty of give aways that everyone could join.
The faucet are only for those who just want to try the site before depositing the real money in the site. Also the gambling sites does not give you any satoshi if you already have money in your account .It is only for those who have emptied their wallet in the gambling casino.
Well that is the main point of faucet, for trying the game and sadly so many people yet abuse the faucet.
Actually gambling site also can give some free coins usually by promotions to get free coins for the users and some freebies. Stake is one of them, they have daily telegram giveaway, discord giveaway every day, challenge everyweek and many else that all users can join even with 0 sats bet.
*I'm talk like this is not because of my sig, but it's a fact, you can check it by yourself if you don't believe it.