Anything that deforms/changes the packet size/routing will always be against most games' rules. So if WTFast does this, you lose.
Some people need them to help level the playing field. If you are from America then you'll have no issues with ping but if you are playing from Australia, SEA etc then having a program help route better to give you 50 extra ping then why not?
VPN's are not used for hacking in any way and have been around for so long.. My.com really needs to fix their in game quarantine system and get rid of this scummy way of doing things.
Their reputation is tarnished already and they still do things like this lol.