Funny you came up with the same exact figure that most of these shady Russian sites sold music for.... (AllOfMP3.com, and so many more like Nuloop and such)
I'd say that $0.20 per track is a pretty reasonable price for digital goods, problem is you're starting to run into a conflict with the amount of revenue the law allocates to the composition's publishers and the songwriters they represent, which in the US is a
statutory mechanical royalty rate of around $0.09 which did not seem outrageous when songs were selling for $1 or more, but at $0.20 for the whole thing, this has the potential to become a huge problem.
Anyway, my main argument is that the Russian sites must have researched the tipping point that would make people 'click and buy', which for music seems to me remarkably accurate at around $0.15 to $0.25 per song. Of course I wouldn't expect any record label to agree to this, this is a fight that will go on until those on the side of copyright owners who must change their expectations are given no other choice but to grudgingly take it.
Speaking of mechanical royalties, the white elephant in the room that
almost everyone is continuing to ignore is that US terrestrial radio is
-unlike any other radio networks in the entire world- still exempt from paying royalties to copyright owners for the use of the sound recording due to a long-standing exemption granted to them by Congress in 1933 to build out their FM networks. (they're still building them as we speak) Only publishers get paid, but nothing goes to those who funded and own the sound recording. [yes, publishing and ownership of master recordings are two separate, distinct areas that most people who aren't familiar with the setup tend to bundle as one thing]
To add insult to injury, and because of reciprocity agreements with other countries, this means that the owners of US copyright cannot collect income from radio play from stations in other countries since those foreign artists are not getting paid this income by US radio. That money goes to 'black box', famously shared and redistributed among society members in whatever country this happened
This exemption is therefore costing the owners of sound recordings an double whammy in lost income. This obviously made sense when one hand was washing the other, and radio play helped certain acts sell into the millions. So it was overlooked as a mere promotional expense. But now that records are not selling, the fact that radio is using all of this music for free -
by only paying the publishers- is sticking out like a sore thumb.
I'd say for anybody who's mad, that'd be a much more logical place to start looking for some easy and very large additional income streams, rather than blabber on uselessly flapping their wings about online piracy. But it means butting heads with the NAB's tough lobbyists and ruffling a lot of feathers in places we usually don't have much access to, starting with addresses on K Street, District of Columbia.