The problem isn't that he used people's Intel to map out the explore formula. The problem is Munk has defended his tool by saying that while he does have access to everyone's information, he would never actually access it. The only thing he has to stand on is his word. But here he is, accessing people's information (presumably without most of their permissions) on a whim of wanting to do something.
Tldr: Munk has given you no reason to believe he's not accessing your information for a strategic advantage.
Important note: I am not claiming that Munk is definitely cheating and spying on everyone using Munk.