Honestly, I would caution against going all-in on just one tribe. We all know that a community is important, but having multiple communities within the same ecosystem is just as important. You can use both tags, and have multiple rewards coming in.

That said, the tribes are still on the Steem blockchain, and everything you publish on creativecoin, palnet, steemleo, etc, is seen on the Steem front-ends as well. As long as the tags are relevant to your post, you should be able to use them all.

So with all of that in mind. We have no real way of stopping a dev from creating a bid-bot to use. It's beyond our control to an extent. We CAN keep them from rewarding in CCC, but if they decide to reward in Steem, there's not a thing I can do.