A big team out there is team 33 - [H]ardOCP and they are actually a community from a forum posting website http://hardforum.com/
Being on a team allows them to see how much their community brings to FAH. There is no actual benefit for being on a team other than that really, its just a fun addition to folding Thats actually why James created the code to allow anyone on any team, because in this folding world it is much different than the mining world people LOVE THEIR TEAMS! Remember, many folders have been folding for a decade and a lot of them do not have interest in crypto as many of them see it as a waste of computational power. Thats one of the reasons we love FLDC, because it shows folders you can contribute good work at the same time of earning a crypto.
To get an idea, you should really take the time to read this thread that i was involved in http://hardforum.com/showthread.php?t=1840249
It is very long, but a fantastic read for understanding how the folding community is towards crypto