I feel like a pack of maps is counter intuitive, but it could be a neat idea if sold only to vips... maybe in that cave under oasis island?

Even an exclusive furniture SET... table/chairs/bed...

But motivation to get VIP should be the stuff at VIP island. There should be rotating items that you can see there, like the bazaar at destiny some one mentioned - it would be super cool if that feature or something like it was on oasis island, to make it that much more special.