If you're above $25k but below $30k, I would upgrade to the Reserve and I believe you would get the 15k MQM/RDM bonus at $30k. I upgraded from Platinum to Reserve a few months ago, my counter did not reset, I had spent just under $25k at the time and I got a bonus at $30k. Of course, maybe you're not too worried about having to spend more money if you're hitting $15k/month anyway, but there's other cards out there with threshold bonuses too ...