Yes Linux users generate great reports because they care and usually are more knowledgeable.

But treat the reports cost time and work, and usually the problems will happen for the majority of their use base.

So, as the company, you can have 0.1% of your sales generating 20% of extra work that will not benefit 99.9% of the rest of the users. It is easier and cheaper to cut that group (us Linux users) instead of support.