I imagine it would have been a lot harder in my case if we'd actually integrated Readlang with Duolingo, sharing user accounts and that kind of thing. Luckily it was quite separate. I was a little stressed dealing with accountants and tax stuff here in Spain, and worrying that the technical transfer would go smoothly. But dealing with Duolingo was super easy.
I imagine it would have been a lot harder in my case if we'd actually integrated Readlang with Duolingo, sharing user accounts and that kind of thing. Luckily it was quite separate. I was a little stressed dealing with accountants and tax stuff here in Spain, and worrying that the technical transfer would go smoothly. But dealing with Duolingo was super easy.