Quote - I'm surprised that so many are making very little money with it.

I'm not.

Right now the top of the page tells me that 2700 people are on Rendo. A quick peek at "Who's Online" shows that 1800+ of them are "Visitor", meaning that they aren't gonna be buying anything - no way, no how. About ~980 are 'members'... and of those, I'd say (judging by metrics from any other online store of this type) that maybe 200 are cruising the RMP at this particular time.

Now, with those ~200 or so, they get to choose from among 4,000+ (or more, prolly more) items in the RMP. Guess what your odds are as a merchant? If you have a new, hot item (and it isn't being P2P's all to Hell), you're lucky to make a handful of sales per day, at most. More to form, you'd average one or two each day, if you're lucky (some get a couple dozen, some get none, and that curve is awfully slanted towards the "none").

Unlike days of yore, your odds today... suck. OTOH, Rendo makes money with every sale, no?

/P