Hi, nice to meet you. First time that I participate in the community and I thought it was a good idea to start here... interacting a little bit with the comments of the other members...
With respect to what you are asking, I am not usually a one thing taster and I would hardly try a single coffee, since there are so many types of coffee that can be enjoyed. However, you have to have the wad of bills in front of you to know if you would sell yourself or not, because nowadays many incluencers sell themselves for certain types of items.
Today for today, I would not accept that offer hahaha I would be being dishonest with a hypothetical audience about my coffee consumption. What I would accept is to try it, as long as it doesn't have any type of chemical/substance/whatever, that could alter my capabilities. An honest review on a social media channel is always great.
It's not cool to say it's the only thing I consume so I would turn that down, but yes I would be willing to negotiate... hahaha.
When I thought about the offer, a corpotarive image of this coffee came to mind haha... check it out.