"Why do people think companies of >70k people can't focus on more than one product/service?"
Because Facebook's core product is failing, and they should have all hands on deck to try to save it.
Because Facebook's core product is failing, and they should have all hands on deck to try to save it.
Like the pre-google (well, and google search as of now) search engines, being overrun by spam signaled the end of the viability of the product. Either they don't have the resources to defend it, or they don't care. Reason doesn't matter.