I'd stay away from hype stocks as well. They do have a bunch going on and are apparently trying to monopolize the industry with a merger with XM, but you are really risking a great deal on potential vs proven margins.
I like them and use them as well, but pay services are a risky business. Some big guy will end up stepping in and offering the same thing for free just to kill them and then you are done. In the mean time the price of the big company dumps since they are losing money and so the whole sector just drops. In the end a single stock MAY raise from the ashes and you may or may not be in the right one.