Hey Gabo, its more important to have a full stadium to get the most possession bonus (+5%) than to use fans to make money. About getting tokens try some surveys and sometimes there are other offers but I do think it depends where you live in the world how many you might see.

Buying players on the transfer market can be tricky. If you have only a few tokens only bid at the very last minute on players that nobody else has bid on already. You can be lucky and get a bargain this way ive got 2 of my best players this way and only needed 1 token each to get them.

Good luck