I did? Both on the store page and in my email replies. Most people were understanding though some weren't.

However, those dollars you seem anxious I don't give up still didn't really cover the time investment of dealing with Linux - not just the support requests, but getting the build environment setup and performing the testing and all of that.

For reference, the game in question did ~75% of units sold on Windows, ~25% on Mac, and some fraction of a percent on Linux. If I hadn't of released on Ubuntu I would have probably lost less $1000, gross.