…But, why?
I can download a white noise app for free, and never have to worry about any advertising at all. Why would I insist on listening to one that’s going to have irregular breaks to tell me that I should use Nord VPN, play Raid: Shadow Legends, or get therapy through Better Help? (Caveat: I actually use Nord VPN, and have for about six years, but I’m probably switching to Mulvad or Proton in a month.)
A lot of people are playing them on TVs with very limited available apps
You don’t have to listen to the advertisements at all if you use the right browser and the right extensions.
If there’s a shell, there’s a way
The wording is a little misleading. A “white noise” podcast isn’t just 80 hours of TV static, it might be a recording of a cafe, a bus station, nature, a storm, etc. not something that’s just generated on-device, meaning it’s gotta be streamed.
There are many free apps that can generate soundscapes like this.