I'm guessing they publish their tax rate on the first page to counter criticisms of "big corps that pay no taxes".

It's hard to deny that a company cannot grow forever with the same product. There's literally only so many people on Earth. It's not a bad thing for growth to stop. It's a bad thing for your product to offer a sub par user experience though. I think this is where Facebook has suffered as they prioritized metrics and numbers over making a product that people love.