Apparently the offer that WWE made to "The Icon" Sting was ultimately equivalent to the standard "Legends" deals that are offered to older, non-active stars from the past. Generally a WWE Legends contract is a $10,000 deal, without any other guarantees.
It should be noted that the last time anyone heard about the talks between WWE and Sting, everything was said to be going smoothly. As things stand now, both sides are still in negotiations.