The internet can’t get enough of the Instagram TOS saga. XKCD has chimed in, but they’ve gotten it wrong. Instagram users do indeed pay for use of the tool – not with dollars, but with attention. Instagram could monetize this attention with advertising, but just because they have chosen not to, doesn’t mean that users aren’t giving Instagram something in exchange for the service. Its the implicit agreement that underlies basically any content-based business.
So XKCD suggests that Instagram is entitled to do as it pleases with user’s content because users aren’t giving them actual dollars. I’m not sure if XKCD is being naive, or if the joke is so meta that I’ve missed it entirely.