If your country is banned but the people from there are allowed by Nitrogensports to access their website with a VPN, then would it not be contrary to the ban?
Also it is the cheaters who use VPNs. I reckon it would be better to ban VPNs, proxies and others. There should only be one IP for one user allowed to access a gambling site. That should be a special rule.
While I can understand some of the points you bring up (using a VPN allows people to get around country restrictions which probably isn't what Nitrogen wants), the latter comments you made are fairly ignorant to be quite honest.
I'm not attempting to make assumptions about your lifestyle, but some of us (like me) have a life where we travel, go to work, like to visit different parts of our city, countries, etc. You've never logged into Nitrogen Sports from your phone while on the go or while connected to a public wifi hotspot (which you really should only be doing with a VPN unless you enjoy getting your information stolen)? Or maybe you go to school or work and you've logged in via your internet there? Guessing these all are different IPs, right?
There are plenty of legitimate reasons for having different IPs in accessing any site, not just a gambling site. Unless you live in a box (that has internet) and you never leave to do anything else. Ever. Who does that, haha?
That's the challenge Nitrogen's fraud team has - a simple blanket ban of any user who uses multiple IPs would probably eliminate the VAST majority of their clientele. Wrongly, might I add. But yes, I'm sure people try to use multiple IPs/VPNs to defraud Nitrogen, but that's almost certainly not the only thing they do. Think about it.