Buying from, and supporting the artist directly, IMO.
Many European metal bands host their own webshop selling their merchandise, records, cassettes and CDs; many small and independent musicians sell their songs on Bandcamp (US based website that does take a cut from each payment, 15% I believe goes to Bandcamp, so that is something to keep in mind)
So their laptops were running Android?
Reading the article it was a closed source OS, with their own closed-source Linux-based kernel.