I'm looking at using https://www.braintreepayments.com/tour/international for online ticket sales a little later this year.

(I'd love to use Pin, but I'm still waiting for a way to use them without the massive bugbear of anything beyond PCI SAQ A, which comes into play as soon as you're POSTing CC numbers to your server.)

PS: Hi Marcus. ProgSoc Rob here. :D