But if you're an enterprise b2b company and want to grow quickly rather than taking 8 years to go beyond 1 solopreneur like this guy you're going to want to do outbound sales.
It's also worth noting that this guys is mostly doing small deals. The literal largest price he has on his pricing page is 72k/yr, which isn't tiny, but his typical deal size is likely much smaller, so it makes total sense for him not to get on a call for $49/month, because that is not a scalable strategy.
But many enterprise b2b companies have a more complicated product than Keygen and charge orders of magnitude more than they do.
Which is not to say that he is wrong, it's just that this is the correct strategy for scaling a low ACV product, rather than a high ACV product. And a low ACV product has to have much broader demand.