I think it's worth clarifying that it's #1 on Billboard’s Country Digital Song Sales. That's a specific category.
According to https://tasteofcountry.com/breaking-rust-explained-ai-country-song in order to reach number one would only take ~3,000 purchases.
That's a shockingly low number, so if anyone can confirm that or has better numbers, I'd love to know.
But last time I brought a digital song, they cost $1. So for a couple thousand dollars any song could be number one in this category.
If I were an AI company swimming in money, that's a drop in the bucket for some free publicity.