Addendum: I thought I should further clarify on my stance since it sort of comes off as mean spirited otherwise.
My point is this: You're buying questionably legal keys from a questionably legal site. You're aware it's legitimate in the sense that they wont take your money and run but outside of that, it's a rules free zone. You're aware there's an inherent risk from buying from these sites and likewise, the deals tracking site you use shows it has one of the highest amount of risks involved at a total of 7 possible problems. Do you:
1) Continue to buy from this site regardless?
2) Stop using grey market sites entirely?
3) Continue using grey market sites but find one with less risks mentioned on the deal tracking site?
There's two right options there. I just checked also and GG Deals includes this problem situation in its list of risks for buying from Gamivo. The only one I can see that has a higher risk amount is Kinguin/G2Play. Again, I'm not trying to be a dick about this but it's really not like the information isn't available from the get go.
If I may offer an alternative and more useful suggestion: GG Deals as a site should perhaps pop up with a list of the risks involved with a given site if one clicks on it, ordered from most problematic to least, complete with a countdown timer or a scroll-to-the-bottom-to-continue type affair. To prevent it from getting increasingly annoying, offer a check box to turn the warnings off. Or just..basically anything to make the "<x> risks" information more clearly available to the user, since I don't think many folks would think to click on that tiny bit of text otherwise.
To OP, I advise going for the sites that have lower risk numbers, even if it's not as good of a deal. CDKeys has always been good to me and they have a support team that actually cares about their customers and wont screw you over because you didn't subscribe to their premium service. That or simply stop using them where you can. I hear Fanatical is lovely this time of year.