I think you're reading into this, you're making inferences that simply have no context or support. As others have pointed out, it's likely a satirical comment about under-utilization of the office space (that's also quite expensive).
That said, it could be good for Twitter to go on a diet. It's spending a lot on employing some 5.5k people [1] and it doesn't seem to be in a massive growth phase [2].