Wasn't that whole thing the result of the amnesty year? When, one time only, the PDGA allowed anyone who wanted to revert back to am status to do so with no strings attached. All they had to do was renew as an amateur and they were considered amateur again (until they cashed in a pro division again). I believe this was in conjunction with introducing the pros-playing-am rule (<970 could play MA1, <935 could play MA2, etc). The whole idea was to allow for players that weren't rated to compete in pro divisions to move back down where their ratings indicated they should be.
So what probably happened was Daemon and Mark, along with countless others, renewed their PDGA membership that year as amateurs. Most pros I know that did that did so simply to save the $20-25 difference in renewal price, then went back to playing Open and taking cash. Some obviously stuck with their am status for a while (perhaps to this day) since they were the ones the PDGA was targeting with the whole campaign. And then there were people like Daemon and Mark who took advantage of the opportunity and moved back to the am ranks and played am majors despite having cashed in pro events. It was a loophole, and it didn't last long (if anyone was taking advantage of it for the "wrong" reasons, they're done doing so by now).