It has nothing to do with tampering.
- Player gathers costly/rare materials from every friend/whole guild, saves a WEBS, sells everything/gives it back, restores the file saved with everything.
- Player gives all transferable items to an alt he wants to gear up after saving a WEBS, then restores and repeats it for every alt and finally auctions the items he doesn't plans on keeping on his main anyways.
Took me a minute to think up two scenarios. How many other ways to exploit it do you think thousands of players could come up with (like repeatedly selling items, if we went with your limitation to soul bound)? About limiting it to soul bound, what happens to people who legitimately lost non-soul bound items or Primordials or whatever? They deserve what you call "basically a middle finger"?
Donated items are done manually, one by one, after checks for the item being bought as well as previous Support tickets opened by that player. It's a whole different thing - like, on top of the different scale, people actually donated money and used the coins received to get them.