I've read this for years, and I'm still not sure I buy it. It smells to me like the same sort of thing as when pundits say Some High Ranking Executive in Govt(tm) does something nonsensical it's because of some cleverness or cunning that we just can't see, when my suspicion is that he is just nonsensical.
But it isn't nonsensical: filtering your client base into qualified leads is sales 101.
You wouldn't advertise tax law services to 100% of the population. Nor would you want to high touch sales on 100% of the population for a sex scam.
I'm sure some amount of it is explained by incompetence, poor english skills, etc. But if that was a real detriment to sex scamming, it would have been worked out of the market.
