Why would I limit it to Kickstarters that high?
Because you said:
I don't doubt that's true, but I'll just note I've seen a number of non-IP based games that had pretty good kickstarters and then vanished without a trace.
And I'm sorry mate, but $10k is not a "pretty good Kickstarter", nor really is $50k when we're talking about comparisons with IP-based games with Kickstarters like $1.7m (Blade Runner).
That a what, 170x difference? Is that right? That's like not comparing yourself to Usain Bolt, that's comparing a literal snail to Usain Bolt, and saying they're "basically the same thing" and should be judged by the same standards.
None of those you list are over $50K (if they are, they're the two who have broken links, or maybe links that only work if you're a backer or something).
If you're not going to compare like with like, you're not being helpful, you're not being fair, you're just playing silly beggars because you know perfectly that there's a huge difference between an RPG that takes $200k or $1m and on that that takes $10k or maybe, on a good day $50k.
What the lowest-money-making IP-based TTRPG you can even find there? I couldn't find one making less than a 100k (in fact, I couldn't even find one taking that little).
Either compare like with like or you're really just proving my point completely, frankly.