Still there are few true barometers of success in the burgeoning world of free ad-supported streaming TV (FAST), in pure money-making terms. Sure, eyeballs are turning in great numbers to FAST services – those offering both AVoD catalogs and ad-supported linear TV channels – but the financial sustainability of these services is what keeps investors up at night. Ad-supported streaming giant Chicken Soup For the Soul Entertainment (CSSE), for example, is consistently growing revenues at a more-than-encouraging clip. Full year 2022 revenues, hot off the press last week, ballooned to $252.8 million, a 129% upswing on 2021, which – in turn – was up 66% on 2020 revenues. Unfortunately, CSSE is still an unattractively unprofitable prospect. Net loss for 2022…