Neither are disses, including The Game line. The Lloyd Banks line sounds like he wanted to rhyme in multi's, so he threw 'the rubberband man' in there to flow correctly.
With the Eminem line, after he says 'Rubberband Man', he states "he just snaps back". Meaning that whatever happens, he maintains his composure, hence the words 'rubberband' and 'snap back'.
And with The Game's line, he definately isn't dissing him because on U Know What It Is vol.3 (I believe), he remakes T.I. and P.$.C.'s 'I'm A King', but he keeps T.I.'s verse on there. Also, he was featured on the Boyz In The 'Hood rmx. 'Dem Boys', which also features T.I.