For years now 10 to 1 a website only allows for downloading in the iOS or Google Store. Having only two OS platforms organizations like banks have a relatively easy task to accommodate the majority of people AND unlike PureOS these platforms are very likely to be cooperative on the DPS2 implementation and data mining opportunities that come with it, hence organizations like banks will try to prevent security and privacy aware PureOS from entering the market let alone offering any app to normies like me, who will be left no other choice than the options @kieran pointed out for us. This is a serious potential violation of user privacy, for now the user still has to agree to that, it is just a matter of time people will consider DPS2 a fact or will be pushed by banks for whatever reason.
As @wimdows pointed out, at least for Europeans, new legislation will be effective and it appears the banks do not seem to care, no room other than the mainstream/established OS
If Purism wants PureOS to be generally accepted by normies and organizations they tend to do business with, PureOS Store should be on Purism’s road map to be pushed and be presented besides iOS and Google Store on websites, be accepted as a full OS platform and have regular download and interactions through a dedicated app.
If Purism wants to successfully implement and facilitate NFC payment methods, the users (normies) should be able to check their balance on that same phone just by using an online banking app. Period.