@OP I respect you and don't take this as personal, what's the conclusion from your accusation?
Let's assume if @Dextro1 is @Cantsay's alt and abuse of merits, what's the punishment? a DT member can't tag someone because of abusing merit.
If a DT member tags you for something stupid involving merit (ie. probably anything less than selling merit), then they're not going to be a DT member for much longer.
What he did certainly make the project he promote become more visible, so the project owner should be happy to have him. For a campaign manager, it might be good to have him since the purpose of campaign manager is helping the project.
I've seen there are a lot abusers out there, but since there's no punishment, I see no point.
Even though I don't like such
dirty strategy.