(Reposting my own comment after I deleted my Medium account and wiped my comments, oops).
— — Originally posted on Aug 25, 2016 — — -
If you also want to prevent commun.it from mentioning you in its “thanks for being a top engaged follower” spam tweets you can request to be added to their blacklist by emailing email@example.com. I have done this (using their earlier email addresses of firstname.lastname@example.org or email@example.com) and it’s been successful, more here https://howtodotechystuff.wordpress.com/2016/04/09/opting-out-of-twitters-3rd-party-community-building-apps/.
All third party apps should have an opt-out option for people who don’t want to be mentioned, Twitter requires this though not all comply https://support.twitter.com/articles/76915?lang=en# — see section on Automated replies and mentions “Users must also have a clear and easy way to opt-out of receiving automated reply messages and mentions from your application”.