These people are now better known among people likely to hire webmasters than whomever won the competition. The students did not violate the rules. The rules say that template sites like Wix, GitHub, etc. may not be used. They did not say "such as" GitHub. There's a difference. GitHub is merely illustrative of the template site concept, in this case incorrectly. The controlling requirement is that it be a "template s…
I still don't think this blanket bans GitHub; only in the context of using it as a tool for generating HTML from text, which the kids did not do.