It's only because I've added admob on the iOS and android versions. I personally don't collect data, but admob does. And when using those apps, you'll see a banner at the top, and a reward video if you press undo.

The steam version will be ad free, but there isn't a iOS/android paid and ad-free version yet. I'm considering it, though.

But I'm also looking for alternative ad providers, that would allow displaying ads while being privacy friendly. For instance, banners that redirect to a board game shop when clicked, and that track absolutely nothing except visits to their site, would be ideal. Surely those should exist, but I haven't found them yet.

If anybody has recommendation, I'd love to hear, I'm learning about this space at the moment.