I'm speaking in absolutes, but of course it varies person to person, and I don't mean to suggest that I think there's no place for this sort of service, only that I think it seems expensive relative to the effort required to gain what is an extremely valuable skill. I think we can agree to disagree!
Even if that unsourced figure is correct, it doesn't really address the issue: if they aren't used to deal with "I was short because my pay was lower than normal this week", Even wouldn't help. That's its a predictable, recurring expense doesn't mean that its not a recurring pattern of timeshifting a mismatch between income and expense, rather than dealing with irregular income patterns.
Even (at best) deals with irregular income patterns, but nothing else.