They have recently implemented changes that moots a lot of the advice we have given @Daffy.
They have standardized interest rates and tied them to your credit rating, they are also vetting every loan before it gets approved to insure loans are descriptive enough and have a decent chance of being filled. They have also fixed the loan listing term to 14 days and set the payment schedule to monthly.
I have no clue if they have done anything with regards to how the rate your credit, I gave up battling with them over it, I sent in a list of at least 50 accounts with younger accounts, less profile % verified, fewer or 0 loans taken and paid back that had a higher rating than I did. This is where I figured out that facebook and linked in have a very very large impact on credit rating, this is why I advise to keep that in mind and look at the social network connections when deciding on a loan or user. It is way too easy to build your social networks up to 500+, I admit I did this with facebook and linked in and had them delete my connections so I could use them to bolster my rating.
I did this because no matter how much I borrowed and paid back nor how many credit cards and bank accounts, id, etc I verified my rating refused to climb. Hopefully they have made the changes they have because of pressure from regulatory agencies for the potential usery that was their last interest rate suggestions and the fact that if you didn't offer that insane rate for your loan you werent seen by viewers unless they clicked a special box.
Sorry for that last run on sentence/paragraph, need more beer, food and then maybe some sleep.