I disagree with xkcd's take on this. Xkcd is proposing that the instagram situation is captured in this analogy:
* Paul puts lots of stuff in Iggy's garage
* Iggy gets sick of Paul freeloading, because Iggy has limited garage space and the agreement between Paul and Iggy was either unspecified or for limited-term, and Iggy feels that whatever length of time Paul's stuff has been there exceeds social etiquette / good taste.
* Iggy notifies Paul that he (Iggy) will get rid of Paul's stuff if he doesn't clear it out in a month.
I feel the analogy sucks because in reality, Instagram has tons of storage space, and the agreement between Instagram and its users was very well defined, even before these terms changed, and because Instagram made a massive pile of dough in no small part because of that original arrangement. A much better analogy is:
* Iggy solicits people to store personal writings into his boundless garage, because of benefits Iggy can derive from mass exposure.
* Iggy in fact benefits extremely handsomely when Fred comes along and purchases Iggy's garages. Iggy remains on in a capacity somewhere between consultant and semi-autonomous steersman.
* Fred-Iggy now tells all people who put stuff into the garages and contributed to the wealth that the terms are changing and their personal writings will be sold and used and appropriated in any way Fred-Iggy wants and profits from.
* And, xkcd comes along and uses an analogy that portrays people as freeloaders, and as selfish for wanting the agreement they signed up for to not be yanked away from them.
This isn't the first time I've found xkcd on the wrong side of an issue, and for me, this has rubbed me the wrong way to the point that I've actually decided to stop reading xkcd. Don't worry about telling me xkcd won't miss me, it's mutual.