I found some website btcminer, btconline, freebitco, ethonline, minebtc, bitzfree etc.
first, not mine but
a faucet program.if it's the most important Legit/Scam,
it's not profitable just wasting time to sign up with your wallet.
Maybe, because its earning so slow. And I found they giving a chance to withdraw money by upgrade my account. Its like hype or investment site. Faucet is free site, they also giving free ETH and BTC but so little amount.
I'm not familiar with those sites, The both member whose commenting above me may more experience about it, so listen to them.
If you want to do "
online mining" or may mining without having some mining hardware, you can rent some hash from some hash rentals such as NiceHash or Mining Rig Rentals, and forget about all of the free programs offers that you said above.
Thank you .