It's regular commuting during a work period, not regular commuting.its definitely a complicted issue, but do note that under the SPT, U2 would not qualify for the commuting exepmtion anyway - assuming they were using Canada for that purpose - because they do not commute regularly from Canada (or MX) to the US (they would have to be residents of those countries).
also, Edge is a PR of the US so he would not qualify anyway.
I might be wrong on the specific statute here, but this is definitely a thing, and they've been doing it since at least Vertigo, if not earlier.