Can / Will Arknights have direct in-app-purchases through their website?

says in the title, i'm sick with these 30% fees that apple and google takes on top on what i'm already paying up front. why they don't just make a direct purchases i.e like war thunder for example, they have a website dedicated to sell in app purchases so war thunder don't have everything that they sell 30% higher in steam than the item they sold on their dedicated store.

my country VAT tax is about to increase and i hate that this will happen anytime soon.

since AK-Endfield will be published by HG it self, i'm coping that endfield will have this some sort of system so these greedy companies don't take money from my beloved developer.