Not sure about the one in the post, but it reminds me of this one.

What? The majority of bot players were on the children MO, Vernen Wells. I don’t think Marfark even progressed until MO players moved over.

It also lets you setup and use the controls for that specific game, rather than sharing the same setup for all games through Moonlight. e.g. KBM controls on one game, used for both on-device and MoonDeck, and standard controller on another.