In a typical publicity campaign, several focus tracks are offered up for download. Writers can post these for their readers.
Sometimes bands are afraid that giving away two tracks will hurt their sales. That’s a valid concern.
I LOVE studying SoundCloud analytics, and I’ve found that when we make a track available for download, that track often has thousands of plays, but the download count is low. There is a steady trend of 10% I’m seeing. When we don’t make the track available for download, I get emails from bloggers and writers who want to cover the band, but need to offer a track download to keep with their coverage format.
Given that trend, it seems more advantageous to me to offer a couple sample tracks, and be heard.