Don't treat Signature campaign as a big source of income. You don't know what will happen to that campaign, some of them are already closed/paused. People who do this are those who don't have a job, i guess. They bought/make many alt accounts to apply on campaigns and sometimes start posting non-sense/shit quality posts.
This should be noted.
Just like the known campaigns like bitmixer, there was a statment not too long ago by the OP they are downsizing by alot.
Which is why they removed all full member accounts to participate. So imagine if you were a full member and got btc just from them, youre now out of luck.