Why wouldn't Lacuna contact Joel...*spoilers*
...and tell him that Clem had him erased? This would be an opportunity for them to "market" the procedure to him as well.
He was obviously upset, and sought out the procedure once he learned from Carrie and Rob that Clem had the procedure. I suppose that with all the people that received notification about Clem's procedure (Carrie and Rob, Joel's neighbor, family, co-workers, other friends, etc.), it's likely that Joel would've found out from somebody. Also, at some point, there would have to be a breaking point for Joel as Clem continued to "act" like she didn't know him.
But what exactly would Lacuna have to lose by proactively contacting him right away?