History shows having a high tie ratio and therefore high software sales are absolutely crucial in order for a console to be successful. Not only does software generate a large amount of revenue, high software sales encourages publishers and developers to release games for your console. Using tie ratios, we could estimate how much revenue each system is generating from software, using approximate average software prices. However, tie ratios are not published every month and are only revealed periodically by insiders, analysts or NPD. Misinterpretation of tie ratios: