Anyone playing sims 3 on Steam

I don't play on Steam but I buy the packs on Steam due to the frequent sales they offer. I then go to the Steam Library, find the Sims 3 cover art in my list of games, right-mouse click on TS3, click on manage, click on CD keys, and then input all of the listed CD keys into the Sims 3 Store website (under My Account > Register a Game).

Once all my Steam purchases are transferred to the Sims 3 store, I download them into the EA App/ Sims 3 Launcher and play through there.