Did the "Director of Public Prosecutions" decide to actually persecute those who the Gardai had spoken with after they were suspected of purchasing sex a couple of years ago during "Operation Quest"?

My understanding is that 30 to 40 people that were talked to by gardai had their details taken and those details were forwarded to the DPP. I'm not sure how it works but wouldn't the public of heard something by now in the media if those people actually were charged by now?