5 Billion is 5% of XRP.
In my opinion if Ripple was truly seeking a solid partnership with R3, 5% is not unreasonable at all. Because from Ripples POV, if R3 had seen the bigger picture, they would have started pushing XRP from that point onwards, as the rise in the asset would have directly benefited them along with Ripple and XRP holders. The point of contention that Ripple now has is that while R3 was busy doing their fundraising and not promoting XRP as promised, Ripple had to do all the leg work. Basically, R3 benefits hugely for doing nothing to help.
Do you disagree?