Alby is just selling software and cloud hosting so the margins are pretty significant. Might be feasible for them to offer a 50% discount to get paid in Bitcoin. I don't think it is as feasible for a small business that has employees and suppliers who need to be paid in fiat. If you started from scratch you could work out deals with employees and suppliers to pay them in Bitcoin as well but then you are going to end up spending most of your Bitcoin.