The visitor needs to be logged in and the AdBlock needs to be activated for the pages they're visiting. If so, it'll deliver them the "logged in user" overlay and a button to "upgrade" so they can avoid the overlay moving forward.
Yeah, that's normal if you have lots of bots/crawlers on your frontend pages during installs. Best remedy is to temporarily turn your board off during any add-on upgrades, but most of us don't bother, just clear the errors.
Yeah, like @philmckrackon said, just add a new usergroup that bypasses the adblock, and then add a "usergroup promotion" that promotes users to that new usergroup based on having X posts.
Wutime updated Content Blur Pro - Boost Registrations and Upgrades with a new update entry:
v2.5.0 Release Candidate 3
Read the rest of this update entry...