Growing numbers of fans are protesting online when labels delay the digital release of hit radio singles. But these consumer complaints are doing little to stop record companies from deferring the availability of downloads.

Just ask fans of “Hustlin’,” the chart-climbing track from rapper Rick Ross.

User forums inside the iTunes Music Store are burning up with posts clamoring for the song, which has been at radio for more than 22 weeks. Ross’ label, Island Def Jam, is yet to offer it for sale as a digital download.

Specifically, iTunes shoppers are using the iMix a community playlist feature intended for music discovery, as a tool to lobby for the track’s release.

In recent weeks, iTunes users have created more than 100 iMix playlists that feature titles demanding availability of the single. For example, “!!!!!!!!$$$$$$$$We Want Rick Ross$$$$$$!!!!!” is a typical playlist name.