Who knows lol I sure don't will play it by ear
I don't know about that.
You've got a couple of things to overcome:
1) There are already brokers for general purpose cloud-compute capacity but, nothing for GPGPU yet as far as I know.
2) Scientific computing tends toward Nvidia. Nvidia has been working on making itself a player in that area for several years while AMD is just started. People with CUDA code aren't going to have any interest in your cluster.
I expect that #1 will be resolved before long if it isn't underway already. Once that happens, #2 will disappear too.
It would be very interesting to see bitcoin miners end up as next-generation cloud providers.