I believe you meant "Prosper" and not "Lending Club". LC never allowed lenders to set the rates, it was Prosper. LC started out as Facebook app for lending.
Equity crowdfunding was hobbled by SEC equity crowdfunding regulations influenced by special interest groups. The restriction on max amount non-accredited investors can invest to very low amount doesn't help investors in diversifying across lot of companies and make follow up investment in winners.
Also, equity crowdfunding platforms haven't done the favor to the industry by creating poor investor-unfriendly terms like no direct claim/ownership of the company, no voting rights, no access to ongoing financials and inability to do follow up investments. A better structure would have been that followed by angels/VCs.