More Than 1 Node Under Same Subnet?

Traffic after the node has been vetted is higher, but do not expect too much as the general adoption / usage is low resp. depends on real customer data up- and downloads. So as long as Storj adoption is low, usage on storage will be low.

If you have different subnet IPs then it would work. But still ever new node undergoes vetting. There is nothing you can do to change that.