> That doesn't really make sense. So it's an ad for raycast?

It's an ad for using CoPilot and for Raycast.

> But raycast said they didn't know about it.

If I buy a billboard that tells people to go eat at a nearby restaurant, that's ad regardless of whether or not the restaurant knows that I bought that ad.

> To me the explanation makes perfect sense. "You can use this tool with raycast" seems like a very reasonable tip.

Raycast is a paid product. Even though they have a free tier, they only have that to get people to use and like the tool enough to pay for it. They want you to use Raycast so you use CoPilot and pay for it. It's an ad.