I believe it's because of services like this that some people argue liquidity ads doesn't need to and shouldn't be handled by the LN protocol itself but I could be wrong.

Awesome news. Let's brainstorm a bit: what interesting things could be built on top of this?

I can start with this one: newbie friendly solutions for running LN nodes like Umbrel could have some kickstart autopilot to join a few swaps automatically. This could further help people to run LN nodes easily (maybe some day without even knowing they are running it).