I'm tempted to do this but even if I don't ask people to quit Nutaku, it sounds a bit like "Hey i'm back here to say how DMM is better than Nutaku and how far you can go in less than a day".
I need to think a bit about thoses things and how I can bring them. Maybe somehting like "You're hesitating on going to the DMM-side of the force? Until the end of this year it's the best time. 2 free rainbows+one 90 FG one (with >150FG for free with all the gifts). That's sounds better. I guess.

Volarmis> That's totally this! Just replace Cookies by FG and 6*.