Regardless of how they want to vote, it's a win-win for the Celtic board IMO.
If Sevco are voted in (unlikely as it is now), Celtic keep the joint sponsorship/merchandising deals which they currently enjoy, while having the get out of "Well we couldn't vote them in ourselves, you lot needed to do it too".
If Sevco don't get in, Celtic have an easy shot at a CL place for about 5 years, and the income that brings will offset any losses in no Rangers. They also have the classic sneidy friend approach to Rangers of "We wanted you, but we were outvoted/our hand was forced by the diddies".
The second scenario is obviously better for the fans, and the lack of Rangers would hopefully force Celtic's bigots away from the game. Thus leaving just the gloryhunters.
Well, I didn't feel right saying something relatively positive about them, I had to say something negative to balance it out!