said by RadioDoc 
:Many of those AOL folks are probably using it for backup or on -the-road access and are double-counted with a broadband ISP which does not offer such dialup access as a perk (most cable ISPs, for instance).
Good point. There is another chart that tries to account for double counting because of AOL's BYOA and because some AOL users access the internet thru cable and telco providers.We try not to count any subscriber twice. For example, a subscriber to EarthLink DSL may also be counted in Covad's DSL numbers and in the ILEC's DSL numbers as well. We therefore do not count EarthLink and Covad broadband towards our total.
We assume that 20 percent of AOL's subscriber base obtains access through another ISP, either as BYOA, or in a more traditional broadband arrangement. As AOL and Road Runner work together more and more, we expect the subscriber bases to overlap more than they do today, and hope that AOL, which is very good about disclosure, will reveal the extent of the subscriber overlap.
This leaves us with the following unique subscriber numbers:
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