I have been using treello for over 6 years now. I used many add-ons and realized one should always avoid unverified and untrustworthy add-ons which may offer some cosmetics/reporting and/or security features but they sneak into your data, share with third parties and make changes/redirect your links to unsolicited webpages.
Thank you for sharing your thoughts.
I am precisely not confused betweent add-ons & power ups. In fact, I tried to generalize the term. Anyway, the 'power ups', though verified by the service, and as I said, sneak into your private details and share with third parties. One of the agile power - up has this issue and I faced it many times.