Yeah, we have a sudden influx of sockpuppet accounts being used to inflate one's own reputation. The community managers have been informed, and are assisting us in dealing with these accounts network-wide.
Unfortunately, this does cause orphaned questions and bounties, but thankfully, we don't technically need the asker to checkmark an answer in order for the rest of us to know which answer is best. Upvotes do that.
If the question is orphaned, but valid, good answers will still be credited justly.
As for orphaned bounties, that's a question that's still up in the air. At least for me. The community managers mentioned that they can be refunded, so they don't create clutter, so we'll see what that comes to.