I can't find much evidence of this issue. If you google actual problems with the TFSI engine you get loads of hits, but this issue isn't talked about. Think about how many engines were made with this part and how many have failed.
What you're doing is scaremongering people with a small outlay of £22 to avoid the exceedingly small and undocumented chance of a large outlay (engine failure due to this "issue").
But if scaremongering works on some people and its okay to have for sale ads the general section, then continue as you were.
It's not exactly scaremongering. I'm just offering a product with a solution to an issue that CAN occur. It won't happen to every single TFSI engine, obviously. However, those people running an uprated clutch do increase the chances of it happening, so anything to counteract engine wear can only be a good thing.
Just because you can't find something on Google, doesn't mean it hasn't happened. I personally know of at least three cases where the uprated clutch was a direct cause of the wear. All of those cars were started with the clutch depressed every time.
I really don't see the issue. You obviously don't want one...that's fine, nobody is forcing you to buy one. I have sold lots though, so clearly people think it warrants the money.
As for selling in the general section, I'm not selling in here, as it quite clearly states. I have spoken to the admin of the site and they are perfectly happy with it being here.