I love the simplicity and ease of the invoicing systems offered by KoalaGo. This solves a major problem for teachers working with Chinese clients who are not able to use stripe within their own countries. And I love recommending this as a solution to other teachers I work closely with. However, the service fees combined with Paypal fees/conversion rate and stripe fees, figure to over 12.5% on one transaction. Out of the $975 USD I have invoiced so far, I lost $156 in processing fees. I'm afraid that in the long term this can't be a sustainable solution for the financially independent online teacher. I hope that Koala might take that into consideration and consider at least offering WISE as a form of pay out.