I know about Gleam since months but honestly didn't try it for real, just reading reviews about it when i was about looking to join a bounty platform.
The problem imo isn't about Gleam itself, it's about the airdrops you get. Almost all of them have no value and you will spend your time/efforts for almost nothing but a promise that the airdropped token will be successful and will reach exchanges right after you receive it.
I join airdrop gleam very often in the past, but yeah now I'm not anymore because it looks like easy to cheat so a fair play participant can stand with the cheater I know because I see in my local telegram airdrop group, that what make me don't wanna join gleam airdrop anymore.
Better to provide more info about this. As far as i know, Gleam has mechanisms to detect cheating activities and it looks running properly. Do you have better alternatives.