Passive investing in Funding Secure

Hello, I was wondering what people think about taking a generally passive approach to investing on FS, meaning following a simple strategy like investing a small amount of money in each new contract put up on the platform, checking every few months, relying on FS's loan selection work to achieve a decent return. Since, as I understand it, the best loans are quickly fully subscribed so that someone who is not checking frequently is excluded from those, such a strategy would be expected to return less than the platform average, but do you think the expected return would still be reasonable (more than 6%, say, to be competitive with the stock market)? For what it's worth, I have taken this approach with a small amount of money I invested a little under a year ago, and now repayments of 2 out of 11 loans I'm invested in are late, potentially more than wiping out the interest I have made. This makes me quite uncertain about whether to continue using FS, particularly since economic conditions are fairly benign at the moment and things could get worse in a downturn. 

I wonder how much to trust their published statistics - they are reporting capital losses as being about 10% of defaulted loans, so about 0.5% overall, but about 10% of loans are overdue, and of course some of the losses on these could be "hidden" if they just aren't being defaulted even if there is not much chance of getting a payment. Do you think their published capital loss statistics fairly reflect what investors will get back from loans on average?

Also, is the secondary market best avoided if you don't have time to look into the details of the loans?