Was it?
All I saw was it being integrated into Firefox, and there being a lot of backlash. Against that backlash, there were a couple of people pushing hard to justify it, but they were either independent or Mozilla employees (often from a different team) posting independent opinions. I don't think Mozilla pushed Pocket a lot. Pushing features through the release cycle is pretty common.
Bear in mind that Mozilla integrated Pocket because it was the kind of feature it wanted to have in Sync (or Accounts, whatever it's called), but decided to use a third party service instead of making their own. From that POV it's much more reasonable. Not denying that it could have been done better with a pluggable open API and an open source equivalent (or whatever), but it's not that bad from that lens.
Sponsored tiles was an experiment, IIRC. Mozilla wanted to see if non-annoying, easy-to-disable ads could be used to fill otherwise blank space. It seems to have failed. But I would guess that a lot of the devs were hopeful about this experiment. I (not a Mozilla employee, but I do contribute a lot) was, at least.