I used to go to a as a simple tourist on the basis that we were trying to raise capital for a telecom start up. Delaware C, SVB bank account. They just asked questions and let me in for 6 months. Anything changed?

That is still an acceptable basis for admission as a business visitor but you need to be prepared to provide detail about your meetings and provide documentation regarding your intended activities, ability to support yourself while here, and ties to your home country.