What is "Interest" in group and how can I use it

[slapAndRun]

I see that groups have a "interest" count incriminator. How do I "vote" or "add" myself to a group so the group's generator knows that I'm interested in teaming up? On the other side, if I've made a group and I see there are 2 people interested how do I identify who they are so I can reach out via the website? I've been directly messaging people via Xbox Live but it might be good to message them via the website as well.

[Hells Warrrior]

@slapAndRun - what happens, is when someone shows interest (i.e. someone contacts that player via the contact method, it accumlates interest). It basically counts how many people have contacted that player via the contact methods the player has used.

[slapAndRun]

That helps quite a bit, thank you.