While I agree that there's a difference in paying homage and running old shows, as I mentioned in a different thread, The Price is Right is a cultural touchstone that would certainly garner more interest in old episodes than Match Game or Sale of the Century reruns. You'll find a lot of people who'll mention the fond memories they have watching Price with the grandparents/parents as a kid, something you're not going to hear about To Tell the Truth or Match Game, something ABC has dumped a lot of money into placing in primetime. Heck, all the shows ABC has revived were all memorable in their own ways, but lack in comparison to The Price is Right's 48 consecutive year top rated run (which is why I'm glad CBS finally started greenlighting more primetime specials). With an advertisement/push, I think it could certainly be worth their while, but I can see why they wouldn't.
Honestly, I'm sure Jeopardy could pull it off for more than two episodes. They just did two episodes because Ken won the GOAT and it filled in the gap to make rerunning GOAT an even two week event. If they reran Ken's entire run or former super tourneys like MDM, UToC, or BotD (surprised most hasn't been put on Netflix) they'd probably do just as fine of a job publicizing it as they did with GOAT. They don't need to do that, my hunch is that they'll be able to return at some point in the fall so they don't need as many reruns, but they certainly could.
Again though, I agree that it'd be better to just go with reruns from the past few years. Honestly, they could dig back in the almost 10 seasons worth of shows filmed since Drew's weight loss (which I think marked a turning point in his hosting, though I think the two are mostly unrelated).