Is this a real open source project or a pretend 'source (maybe-kinda) available' kinda thing where the really useful part is stuffed behind a paywall and the 'o

Is this a real open source project or a pretend 'source (maybe-kinda) available' kinda thing where the really useful part is stuffed behind a paywall and the 'open source' part is just to lure you into the walled garden?