When you try to buy SS and click on the 'Pay now' button, you get an overlay 'Please switch to the pop-up to complete the payment'. Once you go to said overlay and complete the payment, the pop-up gets closed automaticly without any decent comfirmation message.
Back on the site, the overlay does not disappear the once the pop-up has closed itself and if you click the 'Continue' button, the pop-up gets reopened for a new payment; This may lead to people getting the impression that the payment was unsuccesful and make them redo the whole payment again and therefor buy SS's multiple times.
It would be nice is it was fixed, now i'm stuck with way more SS then I needed :(
I'm using Firefox 61.0.1, since this may be browser related.
Kind regards