Them placing value on our planets resources is scary if you ask me (if it has a use it has a value.)
There will be good in this species like there is in ours but sadly the opposite will exist, your willing explorers will be there and my murderous cronies will too. If there is a source of something which has value surely the negative of the species will be attracted to it too, unless we're not worth their time? If we aren't worth their time when they're the lowest of the low then the item can't be that important to them so why bother engaging with us? Valuable has issues. Plus Murphy's Law is probably at play.
If they're doing it simply for their own curiosity and there is no return for them beside knowledge it makes a sense. They get knowledge of us, we get the knowledge they offer and everyone is happy? It's the perfect relationship. Seems very much a eutopian relationship but logical. Who gets the knowledge also? The entire planet. countries representatives or a select few? Do you trust humanity with that? Look at how much destruction we've made with our own discoveries. Say they give us a cure to cancer, what stops that being used for political leverage?
We're talking extremes you're positive and I'm negative so neither of us can or will be correct (there is always a shade of grey altering the black and white slightly) which is my main issue with these subjects, there are no limits to discussions so anyone can claim anything will happen and it's got to be considered plausible. Hell if we use the multiple universe theory we are both right also we didn't have this discussion which I'm sure made you sad.