First of all, there are no statistics of the player count from this particular time, so there's actually no way in knowing how many that played CS 1.6 and how those numbers compare to CS:GO. 10 years ago a majority of europe still didn't have a ADSL or broadband connection, so I wouldn't be to quick to grab numbers out of my ass like you're doing.
Second of all, Valve aren't sponsoring any tournaments. There are no fundings, except for the money that we, the community are contributing with. But I guess that's an unfair luxury aswell? Whining about CS 1.6 not being a better game when it comes to features, like integrated matchmaking, is also a pathetic attempt of an excuse for why CS:GO should've got something for free. CS 1.6 is almost a 15 year old game, ten years ago a matchmaking system wouldn't barely be possible due to the simple fact that the netcode was shit and you would get +300 ping when facing players from other nationalities most of the times because of the average of 0.5-1 mbit connections for the majority of the population across europe. It's a new time we live in, alot has happend the last 10 years, time to wake up.