1. This wouldn't matter either though, they'll just switch between both of the threads. it's one click difference for them.
2. I'm basing my words off theirs for that info. "No support - this would cause low threads/engagement with 1501-1999 Total or 2000+ Total. As others said above it's quite a low engaged section anyways. Threads near the bottom haven't been bumped for nearly 5 days now."