LOL... Yeah, I do hate that phrase, "double digits"..."four digits"... "your pay could be in the 5 digits!"...
First, you know the guy writing it had to sit and think about it, counting digits in his head, and convert from some number he had in mind ("erm... 100,000$ would be a six digit income, but it could also mean $990,000, so I'll call my $105,000 income 'six digits' as a way to scammilly chat it up!").

Second, you know that every person reading it has to sit there and think about *** it means, and what's the LOWEST number it could be, which of course is what the author REALLY means or he'd use the real number.

Third, there is about a 90% chance, maybe even a three digit chance that both the author AND the reader translate that public math wrong and post some complete crapola. I draw your attention to exhibit A.