Donations are extremely difficult to make work. I tried it after getting decent traction in 2009 and didn't receive a single donation to cover server expenses. I'm guessing with Patreon things have gotten a bit easier but for a business I would highly advise against going down the donations route. In general, small payments also tend to take up a disproportionate amount of your support time compared to larger transactions so you have to be prepared to deal w/ that.