Thank you for the reply!
Another update: it seems to affect only chromium based browsers (eg google chrome), so you can use the site with firefox fine (at least it's working for me)

Nice find there, friend! I think this topic should have get more attention, because if we think it through, this method enables ads to be loaded from a third party site, regardelss your third party cookie policy, which means, it may lead to any kind of infection/data stealing by accessing your cookies

So, little update on this: The mobile site is laggy as hell, i had to wait over a minute before I could bump my trade. I can't even imagine the loading time if I wanted to do a search...
And second thing, I made a test script, which runs at every opened page, to test how many redirects (or whatever these ads doing) get, and the results were meh[i.imgur.com]
So something is really-really wrong with it

Views only indicate people interested in that trade, that's not 100% they will send an offer tho. They might find it expensive or found something cheaper, sometimes it needs more views for an actual trade offer.

Yep, no kidding, the site has way too much advertisements, and it slows down the load times, with redirects, auto refreshes, forced ads (even with adblockers), and it seems the site is infected with that /g00 adware, which loads multiple ads (after the site loaded), tricking most adblockers (by opening a LOT of new subdomains) which cause long loading time even with a good internet connection, and your userscript (like the tf2op extension, or any kind of scripts) wont work... please, do something against these voilent advertisement