Even if 1 in 12 people operated a business, they wouldn't be able to
send an email to every person in the US on every day, certainly not
on a 56K dialup, or residential service line.
Why do you think the bulk sends would happen over dialup? There are
already plenty of spam-for-hire outfits who will happily spam for you.
I get spam advertising them nearly every day.
The IRS reports that there were 5.7 million firms with employees.
The vast majority are 1 employee owner/operator firms, with
essentially residential internet service.
Even if you assume sole proprietorships won't spam, that's only a
reduction by a factor of four. That only brings you down to 1840
messages/day/mailbox, which is still 100 times more than most people
would be willing to deal with.
- Bill