Sites like Bandcamp often allow artists to set a "name your price" model or a small minimum (e.g., $1.00) to support the creator.
For creative works, "downloading" a piece typically provides a higher-quality file (like WAV or FLAC for music) than streaming.
Some apps are "free to download" but require an immediate subscription or in-app purchase to actually use the features. 2. Digital Media (Music & eBooks)