Again, revenue is not really all that relevant for this kind of business. They’re a low margin business because they must pay huge bills to record labels. R&D doesn’t cut record label costs.
Payroll is a cost, so it’s more relevant to think about a layoff in terms of its impact to profit (your example) than revenue. Lots of companies sell at a tight margin, so tiny cost savings as a percent of revenue can be a big difference in profit.
If you're burning $40M a year, and you press a button to save $90M a year, yes your label costs are the same but how are you not now at +$50M a year?