No one should have an advantage.
It is a trick. If overriding your own provider's DNS server's domain listing for Seeticket is required, and Seeticket never intended their ticketing services to be accessed by using that IP address, then it's inherently tricky by nature. And no offence, but I think it's slightly churlish of you to suggest that it's somehow naive to expect to buy tickets through official channels.
It's not naive, it's years of experience buying Glasto tickets - SeeTicket's have always provided, and i don't doubt always will provide, a p-poor service when it comes to Glasto tickets.
And it wasn't any different this year - multiple devices, multiple internet connections (mixture of physical and VPNs) using multiple DNS providers, booking page contentiously timed out (even past the sell out announcement). And friends suffered the same.
If you didn't seek out an advantage or outright refused to use said 'trick' which was posted plentiful on Twitter and other social network, so it certainly wasn't hidden from
you or anyone else, then it's your lose and you only have yourself to blame.
Bottom line, i did what i needed to get tickets. 'Haters Gonna Hate' and all that