Platforms are powerful than aggregators
The value chain of any given healthcare market is divided into three parts - patient acquisition, management and retention. The best way to make outsize profits in any of these markets is to either gain a horizontal monopoly in one of the three parts or to integrate two of the parts such that you have a competitive advantage in delivering a vertical solution.
Aggregators follow the first principle; Platforms, on the other hand, are powerful because they facilitate a relationship between suppliers and end-users.
NeftX is a platform!