If you’re wanting to signup for a newsletter via this solution, I extremely advise staying with Substack or an additional service. 2 weeks of emails to support to cancel the registration and also no reply. No capacity to login to a dashboard to terminate either. Serious waste of my time needing to compose this evaluation, tweet at them on Twitter, and email the team to try to cancel one ridiculous registration.
Sparrow
It seems that Sparrow has disappeared without a trace, leaving users without access to their valuable feedback data.