These questions about PoS and the 6 Masternodes (out of 17 so far) that taking all rewards 3 days now have been stated in here and telegram a lot but BeeNode account just ignore them.
I dont want to rush in to conclusions here but things look quite shady in this project.

At least until someone (BeeNode ?) sheds a bit of light into all these issues.

Oh and CPU mining i guess is not possible, you cant compete all these GPUs with a CPU even if you own racks of servers.
Diff is extremely high.