I suppose it's inevitable. Institutional investors are rather secretive -- very different personality from internet social types. The culture changes to reflect the folks they're courting. After all, LendingClub doesn't publish this stuff and has done OK, so it's not like the market is banging down the doors demanding this or else.
It may not be unreasonable, given the results, for Prosper to think that maybe the things differentiating it from LendingClub are competitive disadvantages and maybe things will get better if it cuts them.
Besides, maintaining the data feed software costs and money is tight these days.