Looting the risky salvage missions is still profitable, but they've been nerfed pretty hard. For a 30k aUEC investement, you can generally make $120k, and if you know where the secret illegal commodities console is, you don't have to risk going to a salvage yard with no armistice zone
This is what I've been doing primarily for cash. the 30k missions almost always have 4 boxes in them with a decent chance for 5 (or sometimes none, but that's rare). Then you can go to CRU-L4 to sell risk free.