I think yes that is possible that soon you can earn money too by playing mobile legend or any online game, In dota 2 so many features that you can earn money by playing on it in VPGAME - You can earn dota 2 items by just playing on their lobby game and you get some treasure when your win streak are long and in Faceit - You can earn dota 2 items and Computer accessories by being in the top list.
Developers putting this feature to attract more players and make more players enjoying their games, This feature giving us more excitement so we're not just wasting our time in playing games we earn money too