The faucets which are available in casino sites cannot be claimed if you have balance in your account. I mean you have a account with zero balance and you claim a faucet, now you cannot claim another faucet until you lose all the balance while playing gambling so the point that under developed countries gamblers keep on grinding the faucet is not right.
Not all casinos applies that rule, at least there are some casinos that lets users to claim the faucet although the account balance is not zero. One example of the site is crypto-games.net, I tried it several times while my balance is still few satoshi, but I still can claim the faucet. I live in third world country but I do not even interested to use faucet for profit as I know it is wasting time, even if I do it then get a good luck then I can be considered as faucet abuser which may result in account getting blocked/banned.
I do not think you will be considered as a faucet abuser right away, the only way you can be a faucet abuser is if you do it constantly and get money all the time meaning you are making the casino lose money without ever depositing anything. Even people who bet big and win big at least risked something but a faucet abuser needs to risk nothing and they can get away with a small amount of win to their wallet.
If you manage to do that only once I doubt they will consider you an abuser (depends on case by case and casino by casino) so you are free to do that all the time until they catch on to you but know that the first one will probably be alright. I still would suggest betting a bit more, there are places online where you can get like 5-10 bucks if you work for them and you can deposit that to the casino.