In fact, the domain "only-eu.eu" and the title, "European" are contradictory. Belarus and most population of Russia are unquestionable European, but not EU and clearly not something the author of this website would endorse.
For that matter, Hungary is both Europe and EU, but very likely not politically favorable by the author either. Does that make it not count as buying EU? On the other hand, I assume you support buying from Iceland and Norway, which are not EU (but are EEA and politically aligned). And of course, the biggest question is whether or not the UK counts as "buying European" -- it is not EU and arguably anti-EU but geographically European and aligned in being anti-Russia.