While surprisingly banning a class of services that few others ban is a problem in itself, what's a bigger problem is that a) the ToS doesn't mention it b) it's enforced without warning.
If these are not toy projects, outages can get expensive (due to networks imposing penalties on nodes that don't fulfill promises, or trading getting messed up).
If these are not toy projects, outages can get expensive (due to networks imposing penalties on nodes that don't fulfill promises, or trading getting messed up).