Can someone please tell me what is the last airdrop that earned him more than 50$? I cant remmember earning some money on these scams...

ELTCOIN, HAT, EXRN, STORM, eBTC, BLUE, SGR, eGAS, eReal, ETHD, BTCRED, POS, Soar, ECASH, REBL, iETH... and DeepOnion Wink

And where do you find those airdrops?
Are they only for full members?

A lot of those were decent, but most people dumped early and have no patience.