I think you might be conflating boardgame.io and boardgamelab.app. boardgame.io - MIT licensed open-source JS library. boardgamelab.app - Proprietary platform

I think you might be conflating boardgame.io and boardgamelab.app. boardgame.io - MIT licensed open-source JS library. boardgamelab.app - Proprietary platform for designing and playtesting board games.