That's excuse to pirate content like that. I understand that music is really hard to know what you're getting before you've heard it and then.. well you've played the music and pirated it, lol.
What you describing is more a requirement for a dedicated site or service that combines all the exclusive tracks and oranises them for you so you don't have to trawl each site all the time. You might be on to a winner there
The problem is that the music industry refuses to accept this type of new business model. It may be an excuse to pirate, but the fact is when the industry doesn't provide a service people want than people will turn to piracy. Of course there will always be people that just want free stuff, but really the industry is slowly choking itself and lashing out at "piracy" so they have a scapegoat.