Not necessarily. Nebula operates at a far, far smaller scope, with an emphasis on quality of videos over quantity, and every user is a paid user. If every user of YouTube was paying a couple bucks per month, they’d be making in the high tens of billions of dollars of revenue per year, several times more than they do with ads. Plus YouTube has a ridiculously huge amount of essentially worthless videos because literally anyone can upload a 10 hour video, so surely their hosting costs are higher per user than Nebula.
Didn’t see this until now, but your screenshot actually doesn’t disprove anything. Both sugar and caffeine were reduced by about 40%, which sounds like around the amount of ice added in a typical fountain drink. As others have mentioned, the rest of the nutrition facts are dubious considering that there are fewer total carbs than sugar in the original label. Also, according to Google, there are 4 calories in one gram of sugar, which would mean the original drink should have at least 496 calories, not 320.
Maybe before you call someone a liar, double check your own sources first?