"Artists Beware"

I don't think there are any protection laws like that in the US, plus international sales might not apply the laws of the land for the commissioner. I think that US courts are more likely to rule in favor of even an unreasonable ToS, given their preferential treatment of businesses. Plus it would be up to the judge to deem what was unreasonable. Not being able to post a review might not sound too unreasonable to an outsider.