Marriott had some kind of promo circa 1994 with DL where I got 5K miles for one night's stay in Dayton. That was back when DL segment runs were much more rewarding.

If I had put all those hours spent on easySABRE back in the 90s with command lines into something else like post-grad education, I'd be a PhD. Not sure if that'd be a good thing or a bad thing, but doing mile-heavy trips on sale fares used to be a lot more labor-intensive, even though the programs were more rewarding.