“Have they grown to the point that the huge profits from web search aren't enough to sustain them or something?” The demand of never ending exponential growth

“Have they grown to the point that the huge profits from web search aren't enough to sustain them or something?” The demand of never ending exponential growth pretty much dooms a public company to squeeze money from everything. You can have yearly double digit growth while you are small by increasing your market share but once you get big and already dominate the market, where can you get more profits at the scale you need it?