That 6% is the gross of sales, not revenues as well.
I think you mean "that's 6% of revenue, not profit". Revenue is gross income before expenses and other tax deductions. Sales is revenue generated by selling products and services, as opposed to interest and investment proceeds. Profit is revenue minus expenses and tax deductions and is where corporations often cheat.
He stands to gain more through his political influence than he has lost with Twitter, and the latter arguably helped him get the former. By itself, his acquisition of Twitter is and will remain a loss; in the grand scheme of things, though, it was a sort of investment that is likely to pay off handsomely. If he's learnt anything, it's that the United States have devolved into a plutocracy that capital can steer off the common interest of their citizens and the common good.