I used to mine a lot and I don't think people understand what mining entails.
I stopped mining when I was actually happy about my returns and after s redraw I realized I was making less than 1$ an hour.
I was happy to make money, but the making of money made me enjoy it less and it started feeling like a chore.
I even started dreaming about mining places IRL.
Even now that I returned I don't think about mining ever again. Sure I will lose in hunting, but I actually realized that it is better to lose a little money and have fun than make a little money and feel bored.
I think this is what happens to many successful players and ubers too. Unless you're slightly autistic you don't play this game to make money. You might play with the pretense of investing or making money, but that is just a psychological trick you play on yourself.
Someone that would PM you is prolly not making money or maybe a little. You don't share anything useful. Unless you start sharing locations and times of spawns I don't think that any serious miner would care.