Thanks for the quick answer, the multiple account would work and thanks for the trick.
Seems painful though, would you think there is a solution using Deployments? Like each time we need a “wipe” we create a new deployment. But I’m not sue that addon purchases are separated from one deployment to another.
I’m guessing the refund would only be available for an offer that is already available? in that case it wouldn’t work for us as we’re still in dev stages.