Nick, I received no new respect or gigs as a result of his recording of my song. The singer concerned was Derek Brimstone, and I have yet to hear of any reactions at all to his recording of "Icarus". Nearly every other musician or group who has/have recorded "Icarus" have gone through the proper procedures or, as I said above, have found ways to send me the money otherwise due. I have no idea why he behaved in the way he did, which was, by the way, unpleasant in the extreme, but I doubt very much if he intended for me to receive benefits in kind. My assumption is that he wanted to avoid the paperwork, and did so.
As to whether I had rather he hadn't recorded it - I don't know. All I know is that he did, and it still rankles. Point of principle - well, yes, it is rather a principle of mine that if I, or anyone else, make a commercial recording of someone else's song then I, or anyone else, should follow the correct procedure unless there's a really, really good reason not to.