Quote: "i still dont see how it would be smart to get something that was once free, now moved into a 20$ package (project blue)."
Ply's mod was never updated to work with the current source (to my knowledge) outside of Project Blue. So even if you did obtain it, than you would have to downgrade to a previous version of FPS Creator without any of the features the "migration" has added. But, weather or not it's the smart choice is irrelevant; as the developer of the mod has chosen to discontinue Ply's Mod, therefore your only option is to purchase Project Blue (unless you can get in contact with plystire/hockeykid as BlackFox has already brought up).
And just to clarify, Project Blue is
$28USD, not $20.
Kravenwolf