Probably the credit for that goes more to Peter Sauber, who was running MS in sports cars at the time with Mercedes. EJ was more than willing to accept the £150,000 (I think it was) that Mercedes paid for the Jordan seat, particularly as MS said he had been to Spa before. EJ took that to mean he had raced at Spa, which he hadn't. Then Ross Brawn & Tom Walkinshaw, who had been running the Jaguar sports cars against Sauber/Mercedes and seen for themselves how good MS was and who then went to Benetton, were very keen to sign him up, which they did after the Belgian GP in circumstances that EJ was none too happy about.