Why have Stefon Diggs in town if you aren't going to give him a deal?

The Pats shocked everyone when they hosted free agent wide receiver and noted Pats killer Stefon Diggs on a free agent visit this week. He left town without a deal - so what prompted the meeting? And what should be made of the other recent Pats moves - all this & more on a live 6 Rings & Football Things with Fitzy and Mego.