I think you missed the part where they said "most funded software project", not "most funded project", and that they're using Kickstarter's category's definition of "software".
Kickstarter considers games a separate category from software, and lumps all games (video games, table top, card games, gaming hardware etc.) into one larger category with subcategories.
> I'm actually very slightly surprised to hear that there's no non-game software kickstarter that's raised more than $891,989.
I'm not that surprised, big parts of crowdfunding are excitement, interesting stretch goals and goodies (for higher tiers to increase the average pledge[0]), these are relatively easy for games: the audience is huge, it gets excited quickly (though it can turn on a dime) and values collectibles and "achievements".
Even more so for something which basically only targets web developers.
[0] Hex and Camelot Unchained have both raised over 2 million with half the backers of FA5.
That's an even more different category, they're complex hardware product so the average pledge is inherently very high, the lowest pledge for a Rift was 300 (or 275 for a lucky 100), and that was more than half the under-10k pledges. Ouya was similar (though lower priced, with $99 for the "unlimited" ouya pledge level)
Star Citizen ($2,134,374) and Double Fine Adventure ($3,336,371) leap to mind.
I'm actually very slightly surprised to hear that there's no non-game software kickstarter that's raised more than $891,989.