We sure didn't. I think one guy got hired by Apple because he came out with an innovative app switcher, and I know a few others who got internships there, but largely speaking, Apple took over a lot of features we put into play.

P.S. There's another reason why jailbreaks are few and far in between. There is close to no trust between the people who create the jailbreaks...I had several good exploits that became public without my permission.

Man, you forgot the most annoying aspect: No CVE credit when fixes came out until around iOS 6 or 7.

Although not super consequential, it seemed petty to not do it.

I remember it being a practice at one time in various IRC and other online communities to share hashes of the exploit payloads between teams so that they knew whether or not there was one or more than one, and whether or not they were going to collaborate.

Nah, hashes were public as proof (Usually later followed by a zip file matching the hash).

On IRC, we generally knew who did or did not have vulns and trusted not to BS. That implicit trust did make things difficult.

Apple is pretty rampant about Sherlocking, this isn't new.

Yep, and they've closed down apps like Twitter interfaces and IIRC a camera app because they rolled the use into their own iOS.