How is this a problem? If there are fans who only want to spend a little bit of money to have a few episodes, it stands to reason that they just would choose not to shell out at all for the more expensive, entire season sets.
If it's an attempt to gauge audience interest, like I believe that it is, then it's not going to be a very accurate one. They're going to have people who will get this but wouldn't get season sets, and people who will get season sets but not this. I'd hate for them to kill season sets because this is how they try to gauge interest.
But since you don't believe that, then you can ignore me.