The way I see it, the MM make the most money keeping the PPS between 0.005-0.0095 due to that stupid increment rule. They really don't care what the PPS is as they make money regardless.
To retired shairs they have to be owned by the company... so if they want to keep the same ownership and retire shares they must buyback from somewhere to then retire...
Retired can not be re-issued...there are other ways to issue more stock and or dilute.