It's a buy/sell marketplace, web-based Based on what I've read about what Paypail can do with pulling device info (not much), I find it hard to believe any other site could do more. At first I thought they might be blocking me based on my restrictive hosts file, or the security plugins I use in mozilla. I'm using a fresh IP/OS But having tried stripping all the security stuff, and resetting my hosts file to default, (and trying a new browser, then a brand new OS install) I still appear to be blocked. The point at which I am being blocked may be related to a cloud front script/cloud front net server. It seems like I am overlooking something very simple, and that I must be giving this site way too much credit. But if the thing I am overlooking comes to you, please suggest it! Happy to provide more details if needed - Just totally stumped and thought some of you might have some ideas. It just seems odd to me that if Paypail can't detect a device, how could some far smaller site? I do believe they are employing sift science, which I believe is related to device recognition - also a server called radi co but that seems to be related to marketing not security.