Lets not forget that MrSpread could set the max MN amount to 4000, making it practically impossible to monopolise the network.
Thelone, i do agree about the vultr/amazon thing.
Yes, this is the big question. How to derive the most perfect max DM amount.
Once set it shouldn't be changed. Certainly not by a human. Maybe somehow monitor "the health" of the network and have the protocol adjust the max DM amount (IF it is necessary to adjust it over time. It probably isn't.)