I was an "early adopter" of Listia, and it was a site with great potential when I first joined in 2009. What is LIstia? Well it's a sort of barter marketplace, similar to what eBay WAS back when it was a trading post for collectors and garage salers-- except on Listia, people trade with "points" rather than dollars.
For some years, it was really a great venue and the system worked well... unfortunately, the site owners' efforts to attract people and provide "incentive" and "value" that attracts new users has backfired... in such a way that the site now is plagued by severe "point inflation."
What that means is that where you could two years ago trade 120,000 points for a $50 Amazon gift card, today you need 500,000(!) points to trade for a $15(!) Amazon gift card... essentially meaning that the "value" of the site's point currency becomes more and more worthless on a daily basis.
I have basically lost confidence in the site and stopped using it-- even though I still love the idea of a moneyless trading system. I can't really recommend the site anymore... or I would have to say that a new user should AT LEAST be aware that what's worth something today may be all but worth-LESS in a month from now. A great shame... another cool venue that has shot itself in the foot...