Official Ultras my arse - utter nonsense.
The OSC is a club of football supporters, so I would expect them to have some measure of passion about the game and their team. If, as you say, the club exists primarily to offer access to players (and perks) then I would expect that these player-accessing supporters would, in fact, be even more passionate about their teams than the average supporter. You are talking about what you believe the club is set up for (I think you are wrong), I am talking about the members, the individuals who go out of their way to gain membership.
I have never said the OSC is a campaign group, but it's members have views and it is clear that the majority are against the name-change. There is nothing to stop this non- campaign group making it's position known in the strongest possible terms. The only reason I have seen offered, as to why they can't is that Allam (the club) would remove their privileges; as individuals they should decide if that is an acceptable situation. If I were a member and I had voted FOR the name-change I would still have resigned my membership if the club behaved in this way.
The Official Supporters Club must be burdened with some political mandate in allegiance to the club, which is exactly why it is said they are not free to act without penalty - the figurative three-line-whip; your view that they are not is naive. What I am saying is that members can vote with their feet, or the club can resist the political constraints and take a full and unequivocal stance as their voted mandate demands - and sod the predicted repercussions. Relationships can be rebuilt, as the club needs the supporters, too.
CTWD has made it very clear that fighting the name-change is their primary objective. Omitting that from your argument achieves nothing.