scrap.tf is a little bit notorious for how they run the site imo... especially when it comes to auctions.
For example, you used to be able to bid anything in an auction if you enabled items. The items had their prices based on what backpack.tf's current price for that item was - meaning if an item went up or down in value, the system could quickly update to keep item prices accurate.
On paper, that seems like a good idea.
Unfortunately, sometimes items (especially uncraftables) can have freak price adjustments. An uncraftable cosmetic worth maybe two refined would suddenly skyrocket to a key in value without rhyme or reason. People could then take that uncraftable item, throw it into a bid, and if they weren't caught by the person auctioning they could practically steal items at a massive discount.
The worst part was that once the items are traded by the bidder, the process could not be undone. You could bid on an auction, wait five minutes, and scurry away with loot.
An obvious solution would be to give people a minimum amount of time to reject a winning bid prior to the transaction (something like 24 hours), but that idea was never considered for some reason.
This went on for at least a year before the "solution" was provided, which was to basically ban (almost) all items from being used in a bid.
Don't even get me started on the suggestion section in the forums, which is never used despite the fact the mods refuse to shut it down.
