You seem to assume that being a hugely profitable company is the right thing to be, and that anyone who isn't is bitter and requires a outlet to vent about how their failure isn't their own fault.
What I've seen 37Signals blog posts advocating is building a business such that it is enjoyable enough to run that it doesn't matter if it has a potential multi-million dollar exit. There is nothing wrong with them advocating such a philosophy, and nothing wrong with running a company that holds to such a policy provided no one involved was bullshitted about the terms.
The terms that Mint was running on are different, though, partly because there are investors and founders involved who entered into the deal expecting a profitable exit. Nailing them to a cross makes no sense, because their goals weren't the same, nor do I think they were ethically compelled to be.
But please, let's not make this conversation about flinging one line barbs at Jason and 37Signals so they can send one line barbs flying back. All that does is raise the heat level in the room.