The reach of C-band is clearly large enough to determine a large part of the audience and advertising impact of Indonesia's over-the-air broadcasters. The latter accounts for the vast majority of total viewership.63 In 2013 television generated 68% of Indonesia's total advertising revenue, or about $5bn.64 Indonesian television is, in turn, especially dependent on advertising revenue – and thus on free-to-air distribution – as the low penetration of credit cards, and the general difficulty of collecting subscription fees, have made pay-television very difficult to implement so far