The implementation of Minexon is very good, also the website designs are well done e.g. Vita Theme.
Also the interface is very nice. And you can also customize a lot as you need.
So now to the problems, the payment providers that are used, many are not usable in the German area. Except just the most popular, Paypal and Stripe. Unfortunately, it is so that Stripe does not allow it to operate such a store.
It is not allowed to run a store where you go from euros to a store currency and with this then buys ingame items / ranks. Thus, these stores are blocked by Stripe after verification.
And paypal is also such a thing, I do not want to use more.
And the other various providers ( PayRT, Paymax, Paywant, Shipy, Shopier, Batihost, Keyubu, Rabisu, AnkSOFT, Transfer, Ininal, Papara, Tosla ) Are all not usable in the German area.
If there would be something like Paymenwall or Micropayment it would be something else, but unfortunately there is not and if there will be, I doubt.