The OAS should have had a contract in writing with the Jackal
OK, I know this is a work of fiction and there are probably no answers to these questions, but I've often wondered about what would the expectations have been if the Jackal called off the plan when he found out that Wolenski talked before dying. At his initial meeting with the OAS guys, he said that he would be free to cancel the project if any of the OAS guys were captured, so they should go into hiding. After Wolenski was captured (and killed), suppose the Jackal wanted to stop the project. Would he keep the $250,000 he already had collected, or must he return it? Suppose the assassination was attempted and failed (which it did, of course), but the Jackal lived (which he didn't, of course). Would he be obligated to return the initial $250,000?
I read the book a long time ago, but I don't recall if these terms were discussed in it.