Thanks for the detailed & rapid response, Łukasz!
As long as there is a relatively easy way to have the final, full game on the headset, I find it hard disagree. Some Devs though (e.g. Anticleric, who is producing LOW-FI, which is a $35+ game here) have promised Steam keys to people who buy on itch. Such wonderful customer service gives their customers added convenience and future-proofing :D