You can always earn tokens through Fyber, Supersonic etc. They never give them to you for completing offers and you have to go through the tiresome rubbish of having to do their job for them, screenshots of proof that you signed up to an offer or downloaded and app, and then they still won't give them to you so you get none for helping them do their job for them and earn them money through advertising and sign up only to call you a liar.
So no tokens there either...
Wait, I forgot where I was going with this...