@englishtchrivy it was more about what to link where and how to call 'the button'. There were and are already many (all that I can think of besides cash money and invoice) payment options:

• You can buy at ticket with SBD, Bitcoin, Creditcard, Ideal, Sofort, Paypal and many local e-banking solutions.

And... If your friends ain't Steemians... I have a link for them :) https://steemit.com/create_account

Dank je wel! :)