This'll be an unpopular idea, but it's one I want to voice anyway. Pardon my gumption.
It seems to me that the Tekkit^3 minigames are a value added feature at the moment. Why not add them to the list of voting perks, similar to "/mvtp mine" access? It would certainly encourage more people to vote - especially younger and newer players - and I feel it would be only a minor inconvenience to existing players.
Just a thought. Please be gentle...