This horse has been flogged a bit, but those Macca/Mischa videos have a combined views of over 7500, so I looked at the viewing statistics by country.

Here are the percentages for the USA, Europe and Australia repectively:

Age 35-44 17%, 45%, 50%
Age 45-54 57%, 27%, 25%

Not a sceientific poll, but Europe and Australia have more than double the USA 35-54 population. This suggests that the early family years and cost issues can be overcome.

I'd be interested in any comments by the Europeans or Austrailians on why they have had better luck with this younger demographic.