That, plus I think its to get you more invested. Like if you have the app on your phone you might want to use it again, or youll forget about it and then see it later and think about their product/service/whatever.

In the modern age so many things that should just be websites are apps and many things that should be apps/programs are websites

I’m not familiar, but it does look useful. Seems to combine the best of both png and jpg, with the power of jpg’s compression with the option of lossless compression + support for transparency or whatever else you might want to have a channel for

Webp is honestly a really good format for what its made to do. That being said, windows support for it is lacking for some reason. I don’t know why as it’s been common for a long time now.

Also, you can always use ffmpeg to convert to png or jpg or whatever you want. Simple file conversions like that are super easy.