Scalability: Above average

Poker playing as a solo endeavor can be highly scalable for those with exceptional skills and the ability to play in multiple games simultaneously online. The income potential is directly tied to the player's skill level and availability to play, rather than being capped by physical constraints. Many successful players have leveraged online platforms to play multiple tables at once and maximize their earnings efficiently. However, there may be limitations in terms of mental stamina and the risk of variance in earnings due to the nature of the game.