People just use callibre or other software to read anything they damn want on their kindles.

When it stops being possible people won't buy kindles.

As gog.com and CD Projekt RED shown - it's perfectly possible to make a living selling non-DRMed games (when their servers failed last tuesday people still bought the Witcher 3 expansion in gog, and then downloaded it from torrents), so I don't see how it's impossible to do with ebooks.

Will they turn on the wifi on my device to do so?