This is one of the good faucet that I saw because not only bitcoin is the choices you get but also they have dollars the user can choose between the two. How's your experienced in using mintdice? User will be more attractive if mintdice increase the rate of faucet because we knows faucet the rate is very low . But all of features is good and highly recommended to play to mintdice and your player too.
How many satoshi you expect from a faucet on a gambling site? The site gives you 100 satoshi from the faucet is more than enough IMO because the main purpose of the faucet is to give you a chance to try the game with no risks. Increase the faucet amount should be based on user's level as it can reduce the number of faucet abusers, otherwise if they increase the faucet with no leveling system then many abusers will come to the site for faucet only. To be honest I dont really care about faucet on any gambling sites as I'm very rare to claim it. For me betting with faucet is just something like wasting time and I cant consider it as real gambling because we do not risk our own money.