I've seen a band live (can't remember their name right now) that used a REV2 but had to tape up the Prophet REV2 and Dave Smith Instruments labels on the back of it for marketing reasons.
We don't place any restrictions on the use of our instruments in terms of how they appear in public or in photos, so if a band tapes over the logo, that's their prerogative and has nothing to do with us.
Pretty sure there was a Rev 2 in a Cory Henry and the Funk Apostles gig I watched.