Well here is an INCOMPLETE list of free games with PS+ last year.
Super Street Fighter IV (Arcade Edition), Little Big Planet 2PS3, Demons Souls, BioShock 2, Vanquish, Resident Evil 5: Gold Edition, Sleeping DogsPS3, Borderlands, inFAMOUS 2, Just Cause 2,Darksiders,Saints Row 2, Spec Ops: The Line, King of Fighters XIII, Ratchet and Clank: All 4 OnePS3, Warhammer 40,000: Space Marine, Zombie Tycoon 2: Brainhov's Revenge,Knytt Undergroud, Retro City Rampage, Foosball 2012, Double Dragon Neon, Pac-Man Championship Edition, Lara Croft and the Guardian of Light, The Walking Dead (Ep. 1 & 2), Virtua Fighter 5 Final Showdown, Closure, Renegade Ops, Dungeon Defenders, NFL Blitz, Quantum Conundrum, Rochard, Anomaly: Warzone Earth, Joe Danger 2: The Movie, Mega Man 10, Mega Man 9, Scott Pilgrim vs. The World, Starhawk, Hard Corps: Uprising,Guardians of Middle Earth, Sideway: New York, The Cave, Gotham City Imposters, Choplifter, PAYDAY: The Heist, Bloodrayne Betrayal, Labyrinth Legends, Zombie Apocalypse: Never Die Alone, Malicious....
I would say thats pretty "useful".
Might have been 'useful' for you...