Citizens of certain countries do not require visas to come to the U.S. as tourists or business visitors for up to 90 days, and business visitor status can be an appropriate status to attend a training or non-degreed education/learning program.
We all know you de facto can't do YC without working on/for you company though. So is this legal or not as a tourists or business visitor?
Can those with a B1/B2 engage in those activities (to attend a training or non-degreed education/learning program.)