1Password has a similar feature to notify me whenever a site adds two-factor support or experiences a data breach. Password managers are (or should be) understandably uneasy about integrations, but this feels like a natural extension to those warnings.
I've been thinking through how this could work more practically, and this definitely makes the most sense. I might try to find an easy way to export just a list of sites that I have accounts on and then watch those for TOS changes.
