Yet again, go back and google what Pay to Win is. Please read more than one web-page, article or journal on what the gaming community usually means by pay-to-win, you'll find that every single result says some form of;
Payment for Progress. This means, in-game currencies, point progression boosts, content access, items that aid game progression.
It doesn't take a developer or a genius to figure that out, you're PAYING TO WIN if it's pay-to-win. Obtaining a minion designed FOR a cash-shop, by paying for it is not winning.
The only occasion this would be true was if the case wasl "Fish 200 Titanic Saw-fish to unlock; the ability to purchase a minion for £5!!"
Minions/Vanity do NOT aid progress, you're trying to argue terminology and twist it for your own needs, that's now how things work.
You can't say "Oh, but officer the light was red! Red can sometimes mean excitement or exhilaration or lust, therefore it would make sense that I start driving!".