As i understand exploration works somehow different. You cant just sell a scam. You start your scanners/probe and let them scan the system.
Depending on the quality of your scanner equipment and your personal skill - there seems to be some kind of visual feedback from the scanner, that can be evaluated by the explorer himself - you may find some sites. This sites include mining, battles, special encounters. Just like the thing you see in standard-supercruise at the moment.
So if you find a hidden mining site around mars in sol system you can go to the market and sell this knowledge, either for a high price to a single bidder or for a low price for anybody. You cant just rename the data from "barren rock asteroid field" to "secret-super-high-yield-platinum asteroid field".
However: i'm not sure if you're able to sell it again and again. And i'm not sure if i lose this data if i sell it to you. I'm also not sure if im able to scan again for this data - if i lose it - and have a bigger and easier chance to find it because i already know where it is. I'm also not sure if this POIs are randomly generated or stay the same. Could be possible that this positions are sold by more than one person on the market.