Have this thing across on your mind that merit sources and top merit earners are the ones trying out to monopolize signature campaigns on this forum and milking it out as much as they could?
My mind is too clear to have such suspicions so far - but something is always possible especially since you are never banned from having alt. You are only prohibited from cheating campaign with your alt - you are also prohibited from sending merit to your alt, but you are free to have any alt to join different campaign regardless of whether you are the merit source or anyone else.
I think you have a good argument here - but unfortunately you don't really have the guts to talk to your main account. Next time try to be bold even if you talk about something a bit controversial.
Ex.
New accounts that had been created alone had been flooded out by lots of merits and turns out that they are really that familiar with this forum. Reaching out Senior accounts and even hero member ranking won't really be a problem.
As long as you have good knowledge and don't cheat the campaign - then what's the problem with having alt?
I found some good merit source like LoyceV and some other highly reputable users have alt and join different campaign, it doesn't matter to me because they don't cheat anyone with their alt including campaign. But has it bothered you - or perhaps has taken away your chances of joining the campaign? Honestly - I'd love to know why.