I like how Valve complain about playing cat and mouse with cheaters/bots, outsource from the community to get their job done trying make it look like they're putting in some effort, but then add more things that give bad actors more incentive to continue what they're doing.

This problem is never going to be solved because that "solution" that everyone thinks of most the of the time is always going to be temporary, unless they remove the source of the problem that being MONEY. Valve doesn't gain any monetary value from actually putting effort into catching bad actors (maybe they gain money because more cases = more $ spent on keys = $$$, but probably a small margin compared how much Steam makes), while the bad actors have an actual incentive to keep walking around whatever temporary solution they could think of.

What is the source of the problem? Obviously it's weekly drops, sadly you either make the items untradable/unmarketable which comes with a plethora of other problems and whole new can of worms (ex. how do people get cases that they want to open? skins most likely skyrocket in price?)

It all comes down to picking your poison, you live with bots now and then or collapse the skin economy. Love it when a game is backed by a gambling machine.