CO230 CLE-BOS tonight on 737-800. 7 of 16 seats in F were filled. The back was ~70% filled.

I figured there had to be a mistake but checked pda site and it showed there was nobody on standby for F upgrade.

It has been YEARS since I have seen a CO flight with so many empties in F.

So many empties is concerning .... at that rate, CO will cut even more flights.