You got me confused, your

"You grant to Assembla a non-exclusive, royalty-free, paid-up right and license to use, reproduce, display and distribute such Content on Assembla.com in connection Assembla's provision of the Services to such persons as you may authorize"

sounds much more like Atlassian,

"End User hereby grants Atlassian a non-exclusive license to copy, distribute, perform, display, store, modify, and otherwise use End User Data in connection with operating the Hosted Services."

not at all like the Github TOS.