By that logic DainMorgot;
And warband is often on sale for a few quid; whereas Bannerlord remains expensive. Not even to mention players might be prohibited from playing bannerlord due to system requirements. As you said
"the Numbers do not lie"....
....
Is Bannerlord singleplayer 3x better then warbands? ... or is there perhaps more going on....?
Maybe taking a picture of player counts doesn't really get to the detail of why bannerlords MP retention is so low. I would never suggest that bannerlords increased SP player count makes it directly superior to Warband as it stands.