I loved the idea that much that I built outbid.lol for SaaS: https://saasbid.io
It's basically a SaaS directory where you bid your way to the top.
Claim a spot in your tool's categories (such as Email Marketing, HR or Finance) from $10 per spot.
Want the #1 spot someone else is holding? Bid $5 more than them and it's yours. Every balance is public, so you always see what a position cost and exactly what it takes to pass it.