Thanks for the advice. Yes, building a reputation is the hardest challenge when you have a once-off kind of product. Hopefully the low price can attract leads and we can start from there, although I understand that it can also backfire and make it look low quality and untrustworthy but we need to start somewhere.
Our tool tries to explain each step in detail and also links to the specific Stripe documentation to help the user understand the process to build trust.
The subscription transfer is done as a trial, following Stripe's recommendation.