Your product seems to not be a general fun/social "thing" (which is mostly where you find these mysterious splash pages), but a community aimed towards a very s

Your product seems to not be a general fun/social "thing" (which is mostly where you find these mysterious splash pages), but a community aimed towards a very specific demographic. In other words, most people won't be interested in trying your product. For this reason, it's a good idea to be much more explicit about what you're offering.