"How could they?" Sounds like a Responsible Disclosure kind of thing to me. However, they didn't just ask for the research, they requested additional work in t

"How could they?" Sounds like a Responsible Disclosure kind of thing to me. However, they didn't just ask for the research, they requested additional work in the form of a presentation. That's labor for which there should be compensation. Further, a contract with this potential client that explicitly prevents the client from blocking other presentations and publications; perhaps even barring this client from speaking publicly about the research and what you've found any time before your public presentation. They need to cover the legal expenses for the researcher as well. So you give them a price to get this advance presentation. Maybe you offer an olive branch (and maybe you label it "responsible disclosure") that they might also have access to the research itself before publication. Or maybe you tell them to stick it and go public on your own schedule and throw this industry group under the bus. But that seems like destroying the canyon wall before any bridges could even be built (let alone burning bridges that may have already existed...)