He has not signed it. He may, in fact, talk to any team he wants about a possible contract to play for them. All 32 teams are aware of how the non-exclusive franchise tag works. Obviously you are not.
If Pickens were under contract he’d have to attend mandatory team activities or be fined. He does not have to attend and cannot be fined. If he were under contract he could be traded. He cannot be traded because he has not signed the franchise tag.
He can wait until the very day before the first regular season game, sign the tag, show up to play and is guaranteed over $1.5 million per week for the next 18 weeks without regard for his effort, performance, or his demeanor.
George Pickens is in a pretty good place right now.