It seems to me that there's three options as to why the half Sky money thing was offered.
1) It was an empty gesture from Omar who believed that the rest of the league wouldn't take the money
2) Omar believed that there was a lot more money to make from the Bulls and Odsal and that the club would be able to cover the short fall
3) The club was told in no uncertain terms that to not offer up half the Sky money would mean they would not be allowed into SL for that season.