I expect all 32 teams have someone monitoring PS players.
Y'all have to keep in mind that these are the the practice squads of yesteryear. Under the new rules you get up to 16 on your PS. But you can protect four guys each week.
The new rules make it so that you can't even poach the best 124 players on PS in the league.
I don't know that you are going to get much out of other team's PS at this point -- maybe someone who you liked as a UDFA or someone you had in camp and has some knowledge of your system ... but there are no diamonds in the rough out there.