I believe that I have the right to demand that someone else doesn't use their time to burglarize my house, and if they and other companies have made a side business of burglarizing peoples houses, I think it's entirely resonable to demand that they and any similar company spend time proving that they aren't planning to continue.
(And yes, I realize the houses in this metaphor rarely have doors in their doorways, much less locks, so it's techinally not burglary, but frankly I don't care.)
The proper analogy would be:
You invite a volunteer carpenter in to fix your cabinets. He asks if he can write down what cereal your family eats instead of taking payment. You say sure! (ie agree to the terms of service).
New law passes. He refuses to come back and fix your cabinets for free next time because he doesn’t want to get sued for writing down the cereal names improperly.
You then scream at him and call him names, and try to ruin his reputation on the internet and accuse him of being a thief.
Maybe if the sanctity of what cereal your family eats is so important to you, you should just directly pay money to a normal carpenter next time?
>He refuses to come back and fix your cabinets for free next time
First, Instapaper is a continuous service. If you store something, you want access to it again. It's not a series of one-off, independent services.
So, no, they didn't just "refused to come back and fix your cabinets for free next time". They gave you a space to write your notes and store your links, and then they denied access to that for 2 months (and counting).
Second, you forgot the part where Instapaper had paid services for years, and that many people who are denied service today, had paid good money and stick with it. They weren't asked if they wanted it to br made free and unreliable either.
(And yes, I realize the houses in this metaphor rarely have doors in their doorways, much less locks, so it's techinally not burglary, but frankly I don't care.)