So I searched the forum for best VPN but can't seem to find anything...
Anyways was wondering what the best VPN for affiliate marketing is (specifically for testing offers in other geos)?
I tried Vypr today but still getting redirected/invalid click'd when on a server in the offer geo.
Thanks guys
I use Hide My Ass and Pure VPN.
Mostly at least one of them works.
But it also depends on the offers you want to check.
For carrier billing offers you need other services with real carrier IP supply and no VPN service.
Best one is that is not recommended by affiliates, haha 
Most VPNs are now blocked anyway, but for some basic spying or spying on adult any VPN should be good.
HMA and VyprVPN are good ones.
Yup, what Erik said is true ... the most known VPNs are blocked already by many ... On the other hand, HMA is one of the most known ones, and I;m still using it from time to time to check offers/links from different GEOs an in most cases it does the job 
Another thing to keep in mind : many offers are already device/OS targeted, so you might have to need an agent/device emulator too.
NordVPN has been doing solid work for me. HMA has too many virtual IPs in my opinion and it makes it hard to spy some Geos. IP vanish was also good.
Checkout ExpressVPN, they have servers in around 90 countries. Many website still can't detect expressvpn even netflix.
And you'll need a user-agent switcher too!
LeadCloak
Another vouch for Nordvpn.
I use them for my pc, mobile and my girlfriends mobile and pc. All with one subscription.
They do however miss a few Geos in Africa and South America I would like to spy on but I doubt other providers have coverage there.