Country denylist for PayPal payouts

[brawaru]

Is your suggested enhancement related to a problem? Please describe.

Currently Knossos shows PayPal as an option for every country in existence whether PayPal operates there or not. Confused users often able to link their limited PayPal accounts, however when time comes and they make a payout, the payment immediately gets rejected or just stuck in processing until the case is resolved through support.

Describe the solution you'd like

While PayPal does not provide any APIs to check the availability of PayPal in a certain region, we are able to block regions that we know for sure don't support PayPal and likely won't support in the future.

Here's a list of countries that don't support PayPal by Trolley:
https://support.trolley.com/s/article/Banned-Countries-Payout-Alternative

Not included in Trolley's list is Ukraine (UA), however, PayPal operates there temporarily, and is limited to peer-to-peer payments only. We had a number of users from Ukraine contacting support regarding PayPal payout option not working.

• We can provide a route that sends this list so we can dynamically hide PayPal for these regions in Knossos.
• Additionally, it can be used to reject PayPal linking, since we use OAuth for PayPal and able to see the account's region.
• We also may track payout errors to help us maintain this denylist by letting us know of regions where payouts never arrive.

This should remove tons of confusion about PayPal availability and improve creators experience, albeit also make some creators sad due to lack of payout options (rip).

Describe alternatives you've considered

• Making a support article on this. No one reads support articles.
• Shrugging it off and doing nothing. ‘Hey I try withdraw my money but it not arrive’. #WeCanDoBetter

Additional context

ICOM-2159, ICOM-2264, ICOM-5485, ICOM-5860