Isn't the original Joel Test a transparent pitch for FogBugz?
Point taken. FogBugz was also, AFAIK, not a perfect solution for everyone (e.g. I don't recall it offering much for a shop where everyone uses screen or tmux as their window manager). But the underlying principles were handy anyways.
Other times a pre-existing solution like Domino may help. I found out about sigOpt yesterday, for example, and balked at the price until I discovered they allow academics to use their platform for free. All of a sudden the hypercube searches I was dreading for tuning regularized tensor factorizations became a nonissue, and it costs me nothing.
If that becomes something that other people want to use (probably so, now that I think about it) I don't see why sigOpt shouldn't make a pile of money off it. And the Domino people have offered their platform free or cheap to our group in the past. It's not because of principles that I turned it down (my only real principle is "don't buy the cow if you get the milk for free"). It just didn't serve our group's needs. But the general principle of a shared, convenient store for data and analyses is a good one.
The other general principle that I tend to emphasize is that you should always see about a free trial beforehand. :-)