Although they may nibbble at a ittle bit, they will probably make a bed of it instead, and use it as a toilet! So really not a lot of point if you have already given them some soft shredded paper bedding.
I thought you shouldn't use hay for hamsters-I always used sawdust and that shredded jay cloth bedding stuff. Also, if you've got a paper shredder, hamsters love shredded paper for making beds-and it's free! (but make sure it's plain paper, because ink is poisonous if they eat it)