The EU bank status might explain why Paypal e-mails me each month to remind me that I have money in my account; it's only a penny, but I don't remember such notifications back in the early 2000s when they were only a California-based company.

They even send you that monthly reminder when you haven't touched your Paypal account for months. It's basically advertisement you can't turn off.

It will be interesting to see what happens with them in the UK after brexit.

It's quite plausible that brexit won't/couldn't change anything - depending on how exactly brexit is handled, UK may stay as a part of the relevant treaties so the licencing of financial institutions across EU/UK border will stay the same.

Probably getting a e-money license in the UK as they are easy to get.