“Cerebro.app” can’t be opened because it is from an unidentified developer. I'm really curious why developers release software without signing it. The Mac devel

“Cerebro.app” can’t be opened because it is from an unidentified developer. I'm really curious why developers release software without signing it. The Mac developer account and code signing certificate seem like a small cost if you're releasing software you actually expect people to use. Personally, I see that warning and assume the developers aren't serious and/or don't care about their users and delete the software.