As i understand it, what the Raiders are asking id based on speculation. None of us know what they're actually willing to agree to. All i know is I wouldn't agree to anything more than a 3rd and the Raiders covering a chunk of the salary. They don't have to agree to it. If they don't, you walk away. And fwiw, Bill Belichick is on record saying the Raiders won't get more than a 4th for Adams, so there's that.
Adams don't care about all that. He just wants out. It's up to the Raiders to make it work if they're serious about moving Adams. No team is gonna take on his entire salary.
That's why I said there is some risk in acquiring him. It's just as likely to fail as to succeed. But I'd rather try and fail than not try at all.
If he helps the team make the playoffs, that would make the juice worth the squeeze. It might not work, but it does make sense.