We can use a vpn to complete other offers right? Doesn't seem illegal or anything to me

VPNs are against our terms of service and the terms of service of all offerwalls.
Advertisers (and an advertiser is behind almost all individual offers) are paying to reach particular demographics. That's why there are regional limitations on many offers. Using a VPN to bypass those regional limitations makes the advertisers cranky.
And it's why we're working on adding more ways for more regions to earn Coins.
