Even then it can be done just increasing the campaign participants and also making multiple signatures but As for the dual signature campaigns, it will present a casino differently on the forum, as we've already seen this on Rollbit, I think it can attract community members in a different way or grab their attention more easily.
To spread the EVO's name regardless of the campaign you are a part of around the forum is beneficial both to the platform and to us members. Whatever they decide, I would love to be a part of and help as much as I can.
It's indeed a good way to attract people to the platform in a different way, people love things differently and when options are made available, who is not attracted in one way, will get attracted through the other way..
But on the other hand, it's money we are still talking about here, marketing is expensive, and requires to be run for a very long time for maximum impact, and running to campaigns at a time requires hiring two groups, and paying them weekly, if the casino is wealthy enough to handle it, it's still for their own benefit anyway, but it's better to run a single campaign and have it stay active for a very long time, than run two campaigns and close it within few months or weeks.