You are confusing the concepts, pay 2 win, is something, that you can't get without real money. For example, if we add to our shop a special not-trade buff +100 max hp. That is absolutely not fair. There is no other way you can get it, except buying in shop.
But there is no such thing in WT. All items that you could buy for real money are saving your time. And you always have to think - you better spend this time playing and searching for a recipe, or spending some money to save your time.
And yes, we offer a special armor for those, who want to support our project. But as you have mentioned - you are playing a game with full loot. You want this armor, but don't want to spend money? Well - find someone and buy this armor, or kill someone and loot it. What's the problem?
Or, you just want to cry about people who spend money are getting more stuff faster and easier? Well, yes they do. That's for they spend their money.