H-1B visa holders are tied to their sponsoring employer. Do you mean what they can do outside their H-1B employment? What other things are you interested in doing?

> H-1B visa holders are tied to their sponsoring employer.

Thanks, that answered my question. I have no intention of working in the US at the moment, just keeping myself informed in case i ever change my mind.

Tbh I thought some random HNer would post an explanation before you got to this.