Ok, so it's just if Google does it then, because they are the only ones with "great power?" Although "with great power comes great responsibility" is a cool catch line, it's extremely nebulous, especially as presented. What you are saying is that if any company provides a widely used product, say like Instapaper, they are ethical mandated to continue providing it, etc. Why would I create something for fun then, if I'm morally obligated to dedicate to it in the off chance it becomes popular? When can products close down?

Also, your solution is hardly more ethical than theirs, even if it puts the "well-being" of users first. It's just more binding than what already exists. In my opinion, it was perfectly ethical that Google gave its users a good head's up to the situation and that they even provide a way to find other services that might replace Reader. It's not like it randomly stopped existing one day or like they promised it would always be there. No moral code was broken and no ethics or rights were trampled on. It just sucks and you have every right to be upset. To be a proponent of "you either support it forever in some way or you're (ethically? morally?) evil" isn't really helping though.