So they are capitalizing on the ban of songs.pk, not a bad idea at all. If the prices are really between 5-15, then it's gonna be awesome!
And I don't mind the limit of 5, once I download it, I can transfer the same copy in my mobile. Only when for some reason if all my data gets deleted (such occasions are very rare) will I need to download it again. So the limit of 5 is fine for me.
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The only possible problem I find is that if someone has an unstable internet where the connection is interrupted frequently, what happens if he tries downloading it 5 times and the connection is interrupted each time? Will he lose out on the track even after paying for it?