I think Hive shows a lot of promise even though it seems to be flying under the radar a bit at the moment. Populous got sold out in the pre-sale, yet Hive addresses the same issue. They'll buy the invoices themselves though, instead of creating an invoice marketplace. This revolution of the invoice industry doesn't have to be a zero-sum game, and even if it is, Hive might just surpass Populous at a certain point. We'll see when the dust settles ;)