Bear in mind that Baremetrics removed self-serve account cancellation back in 2015. The founder admits in a blog post that it’s to reduce churn, and reduce churn it did, by 15%.
Sounds like there's a long list of SaaS apps to avoid:
Any explanation as to why Xenon installs this policy?
Without any further background that list of companies is going straight to the red-flagged list that will never get my business.