CEO's of most American companies that are publicly traded, have fairly modest
salaries, but are given stock grants when they meet certain performance criteria. So while 58k a month is almost 700k for a year, CEOs can easily make more than that.
A CEO might make 300k salary, and then perhaps be given 500k - 2,000k in stock grants. The company does well, the stock grants are larger, and worth more money. The company does poor, the stock grants aren't worth as much.
Second, the CEO pockets all that. Its his personal compensation. He'll have to pay appropriate taxes on his salary and his stock grants.
The 700k a year that Summertime Saga pulls down is NOT Dark Cookie's personal compensation. Not being an accountant, I'm not exactly sure how one would record bulk Patreon funding, but my guess is that its at least logged as Company income, which is then used to fund many things:
Whatever fees Patreon takes off the top.
Wages for DC, Programmers, Riggers, Writers, Animators, Web Admins
Pay ongoing costs of tools, webhosting fees, one time costs for music, ect
I'd be surprised if DC pulled down more than 15k a month personally out of that, which is still a lot of money, but no where close to what a CEO of a fortune company makes. Not even what a CEO of a (less than 10k employee) company makes.