It's just a plugin. They could have put it in the store, put a message in the update info "try pocket, we'd like to ram it down your throat but someone here with sense suggested we could give you control over your browser". Ta-da.
No need to put it into people's toolbars, pretend it's integral then put it back in people's toolbars when they remove it.
It's just disdain for users and the exact sort of heavy handed tactics I use FOSS to avoid.
Same thing with changing start pages, just leave it alone - suggest new defaults on update and allow people to subscribe to adverts if they want them.
