As for Sabretooth among the Original Avengers, he was not in it for the money.
He was Romulus's spy. What he wanted was intelligence. Using S.H.I.E.L.D. as a platform, he secretly monitored Wolverine's movements so his boss could find Wolverine whenever he wanted and torture him.
However, Romulus had been rather quiet lately. After having Sabretooth kill Wolverine's entire family and taking Wolverine's son away to raise as his own, he had made Wolverine lose his memory again.
Recently, Logan had been living like a savage in the mountains near the Arctic Circle in Canada. He had even become the leader of a wolf pack.
He only remembered that he was a wolf, so he lived as one.
As for the last member of the Avengers, Dominic Fortune, he was actually Fury's plant within the Avengers. That was hardly surprising. Everyone involved in espionage had a dirty heart. Fury would never rest easy without placing one of his own people among them.
Fortune appeared to be a con man and detective, but he was actually a Level Six S.H.I.E.L.D. agent, codenamed "The Instigator," as well as the Original Avengers' strategist.
Fury had originally wanted Steve to lead the Avengers, but Steve and Bucky had gone traveling around the world. No one even knew where they were now, so he had to make do.
That was how the Original Avengers had come together. It would have been a miracle if they had lasted. Not long ago, they finally could no longer hold things together and disbanded.
Hunters went back to killing people, Silver Sable went back to taking mercenary jobs, Sabretooth vanished, and Fortune returned to the S.H.I.E.L.D. ranks.
But impressed by Fortune's talent for egging others on and using them as weapons, Howard tasked him with founding S.H.I.E.L.D. Academy. Modeled