How many of you got the news? The Russian bear wresting beast is finally up to take on self-proclaimed wannabe boxer GayWather this May. More info about the event can be found online (Sorry for not linking the sources as I'm not able to find them at the moment). The update I saw was on Khabib's official page about this event on May 2019. Just thought of you guys know to plan your bets in advance.
You cannot link the news as it is not true and i am a fight fan and i really do not want to see either of them fight, Mayweather coming to MMA to face Khabib and vice versa in a boxing ring would be the worst match up anyone can put as both will school each other in their respective sport and there is nothing intriguing to watch if you know the results already. If there is a betting line that this match is not happening I will bet happily . 
Does Dana White make any money out of this at all if the fight is boxing? I mean did he made a single cent from Conor vs Mayweather fight?
Looks like you have no idea what you are talking about, the majority of the profit from the Mayweather Connor fight goes to the UFC as they were the co promoters of the fight and with the dismal UFC PPV buys that year because of the lack of any intersting fights is covered by this single fight.