That's an interesting interpretation of GDPR that you definitely don't see on other platforms. I think you're being way too strict here.
Especially when the Actor isn't a generic scraper, where I can understand sensitivity. But for Actors that are closer to an API they're querying my data.
This can also be solved with a pre-checked box where they agree to share once they run the actor for the first time, if they dont want to share they can uncheck