Every number is Russ’s own rating out of 10. Russ has previously stated that he never scores in sponsored videos, so the food he reviews carries no applied pressure or bias.
The Cobs Drizzl'd Strawberries & Cream popcorn gets 3/10 and is a big letdown. Russ says the white chocolate adds no flavour and just melts on your fingers, though it's at least not stale like a popcorn he hated before.