the easiest way to gather token is bounty but you will need to buy it first but if you want to gather profits without buying anything why not join the airdrop it is good for starters and all you need is to follow their rules that all
I think you missunderstand about this mate.
If you join bounty why do you say that we need to buy it first?
Join bounty is never need to buy it first because we will get the token by doing some task to promote the project