That was quite the irony. After his youtube video called "Art before commerce", the loud music plays with a SUBSCRIBE in large type and the Patreon link soliciting donations right after it.
Maybe he just meant literally art (the video) before the commerce (the Patreon llnk).
I don't know if there was much controversy around the comic strip, but if there wasn't, that's amazing. To say something like this and not get embroiled in controversy is pretty amazing these days:
Calvin: History is the fiction we invent to persuade ourselves that events are knowable and that life has order and direction. That's why events are always reinterpreted when values change. We need new versions of history to allow for our current prejudices.