Sounds like they squandered their "last chance"....heh heh heh. 
Actually, on the contrary. Before they got on WBCQ nobody knew about them. After they were on WBCQ, thousands of people knew about them. Even though not many of the population, percentage-wise, listen to SW, there are probably a few hundred thousand people who hear WLC's programs in the US, Canada, and elsewhere.
If you're running a small religious sect that numbers in the hundreds, or low 1000's, the PR you can get from something like WLC's SW broadcasts might draw in some new members. They have a website, sure, but as we all know, having a website doesn't mean all that much in the internet age where there are literally MILLIONS of other websites.
So, from their perspective, maybe the expense was a loss, but they may have added to their numbers because of it.
There used to be a radio ministry in the 1960's and 1970's called The World Tomorrow that was similar. They were on secular, commercial radio stations all over the US. The program was a massive expense, but it grew that sect from a few thousand to several hundred thousand or so.
So even though the ministry ended up losing money (as far as we can tell), they may have gained some members because of WLC, and to a ministry, that can be a net gain.
That was meant to be a joke...but OK. 
No, I recognised the 'joke', but what I said was pertinent, because this is how radio ministries operate -- it's their 'business model'. Ministries and churches -- whatever we think of any of them -- view the use of media differently than the usual non-profit or commercial model. In their view, nothing was actually 'squandered'. So yeah, good pun but what I said is undoubtedly how those in WLC view the failure of the SW operations.