Blockland is ostensibly the same game as it was in 2007 or whenever. The gameplay is, for the most part, completely the same. I don't see how you can think it's somehow not worth your money now. Unless you're trying to say that after X many hours playing it, it's gotten boring and thus not worth your money, which is a ridiculous position to have.
I don't recall seeing any promise that Blockland would feature dynamic, frequent updates. They've always been icing on the cake.