I don't know much about running a public company, but my guess is that he has an obligation (maybe a legal one?) to his shareholders to not hint to news like this before the company is officially announcing it.
So the original author transferred ownership (incl. github page) to a the uBlock community, in reality to one of them. It turned out he handed it over to s kid who in turn made some weird source code changes and asked prominently for money/donations.
This scheme seems to popular with adblockers, afaik the original AdBlock and the AdBlockPlus had a similar "relationship". And later a German company took over AdBlockPlus in a similar manner and is doing big business in a gray area (whitelisting domains costs ad networks a lot of money and is absurd for an adblocker!?)
[0] (warning: auto-play video on page) http://www.ibtimes.co.uk/twitter-ceo-dick-costolo-laughs-off...