To add to what mrcastelo said above, almost all signature and bounty campaigns pay in their own tokens/coins. Campaigns that pay in BTC (For example, Merit.me) are mostly restricted to Senior Members. The Merit project signature campaign's lowest rank requirement was Senior Member.
To earn BTC, you can try surveys and odd jobs online from bitcoinget.com but don't get your hopes up about making a lot . For example, each of the surveys there take ~20-30 minutes to complete and pay ~10k sats.