Quote from Wikia:
"Choose an Alliance and your wiki will get updates about exclusive content (think beta codes, star interviews, giveaways, etc.) from member communities. Communities that participate will receive the badge on their community, proudly showing their alliance and giving first-access to this extra content. Plus, your community will get promoted on the hub to which it belongs, on Wikia’s Twitter and Facebook accounts, and you will be listed as member in the links below for all the world to see."
So, we get our wiki promoted, so we boost the popularity from 1 to 1000+. We also get exclusive stuff and a cool badge. Our options are...
Fantasy Fellowship SciFi Galaxy Heroes United Fantasy Fellowship and SciFi Galaxy Fantasy Fellowship and Heroes United SciFi Galaxy and Heroes United All three
So, which should we go for? I'd want to join Fantasy Fellowship and Heroes United, but what do you think? If I don't get a response, I'll just go for it. :P
We have now joined Fantasy Fellowship and Heroes United, therefore the thread is now closed, and we might be moving off Wikia soon anyway.