It's a double-edged sword in a way -- more people using the project for doing non-illegal things means perhaps the moniker "Dark" could be replaced with a less hostile word (Private? ...no...)[1].
Bad, in that, it speaks a bit to users making inconvenient choices because they perceive their privacy is threatened enough to warrant it.
I was glad to see that they scrubbed the content -- would have been one scary tarball to download, otherwise, and very illegal for them to post considering some of those categories. It makes me wonder how they avoided running afoul of the law just collecting/viewing it for the purpose of scrubbing it, but IANAL. It'd keep me from being involved on any project like that, though!
[0] I'm eye-balling the counts for a few categories in addition to the obvious "other-not-illegal", so it's probably not 100%, and I'm assuming US law (specifically WRT speech)
[1] I get "Dark" is meant as "invisible" and it's perhaps even a more accurate description since it's not completely "invisible" unless you take additional steps (and the software contains no known flaws), but sufficiently invisible for most adversaries. However, it's spoken in the same breath as "drug/theft markets" and is used more like "dark alley". Not sure there's a better term and I'm probably bike-shedding, anyway.