He is still in PFL roster. Havent found that he is a free agent again. PFL contracts turns to be more flexible than UFC 
I like how PFL is handling business, they give more freedom and tournaments competition is great.Contracts in UFC can also be flexible but only for Conor McGregor, for everyone ekes it is restricted area
Anthony Pettis didnt have the very good results in PFL, since he came from UFC he lost four fights and won only one in PFL, so he had to try something different.
His younger brother Segio Pettis is doing much better in Bellator, after moving away from UFC he made four wins and his next fight should be against Patricio Pitbull.
Did you also notice, that after people are released from UFC (but they are still active fighters), their career flies down ? Like UFC drinks all the juiced from them. I have never seen any (at least cant remember quickly) anyone who used to be good in UFC, and continued to be good in other promotion (of course if we talk about fighting decent opponent, not newbies or opponents with deep negative records).
Since PFL is more flexible with their contracts, UFC now walks hand to hand with WWE, do you think we gonna see more flexibility from MMA promotions? Like UFC allowing their fighters to compete somewhere else or even do other sport ? For example when a fighter has active UFC contract, he isnt allowed to participate in grapping tournaments, play football on more than amateur level and etc. Sort of a NHL clubs allow their player to participate in IIHC or Olympic games when their team isnt playing.