I work in a division of my company that was acquired by it 10 years ago (about a year or 2 before I started working here). When I started, there was "pizza Friday" every week. About a year later, it was every month (and headcount was much higher). A year later, we were building out into another part of the building that we took over when the previous tenant's lease came up. Fast forward. Now, 2/3 of the office it gone, offshored. There's a monthly bagel Wednesday. I've only stayed this long because my manager is pretty awesome.
But I feel like I've seen both sides: Growing out of childhood and falling into senescence. The next time I see this pattern, I'll leave a couple years earlier.