RE:Quickable is a free appThey probably get a commission by driving traffic to eBay. I know this because I was once involved in a business like this. The payout is usually around 3% of the GMV and eBay takes it out of their own listing fees. Take my word for it, this is a VERY good opportunity if done correctly and looks like they are headed that way.
https://www.ebay.com/gds/5-Simple-Steps-to-Join-The-eBay-Affiliate-Program-/10000000007218670/g.html
The money you earn in commissions is between 50% and 75% of eBay's revenue on winning bids and/or buy it now transactions. eBay also pays you between $25.00 and $35.00 for each new user that registers from your website. If that's not enough; affiliates are rewarded with more money with increased performance rewards. So the more traffic you drive the more commissions you will earn for each transaction or new active user.
For success with the eBay affiliate program, we recommend that you grow your affiliate websites empire by creating as many websites as you can. And since eBay offers every imaginable product; this allows you to easily choose your niche or products to promote. Some items sell for thousands of dollars every day. We also recommend you stay current with new trends and technology to create new affiliate niche websites when the opportunity arises.
You can start to make money online very easily; all you need to do is join the CJ program for eBay affiliates, purchase a website builder script, a domain name, and web hosting. And with just a little effort you will have the opportunity to earn money online from your own home.