Devonta Freeman's deal, signed in 2017, is five years for $41.25, with only $17.3 million guaranteed at signing. Add another $10 million is signing bonus, and you get to Fournette's level.
Might Kamara do five years for, say, $52 million? Especially for a fully guaranteed deal? It's hard to imagine his style of player getting a second huge contract after four years at age 28 ... seems that fifth year could be enticing.