I used them, when I started. The problem was the accounts were all slow as hell. They used to optimize web graphics for dialup, but now that everyone has broadband, nobody bothers anymore. So, on dial up, everything is super slow.
One advantage is they have dial in numbers everywhere. Other than that, I see no further advantages.
As far as dial up services theyre a decent provider.
I myself still use dial up for stealth account creation. Yes its slow but if you have all the right shortcuts it cuts down on the time needed to do things. And it is one of the safest IP solutions out there.
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AGED SUPER HIGH LIMIT ACCOUNTS: 10,000/$1,000,000 and 25,000/$500,000
I don't do this anymore. But if you use something like Auctiva or InkFrog for listing items where you don't have to sign into your eBay to list items it helps.
Then using the Dial Up like at night time to print labels and answer questions. I did that for stealth from like 2008 to 2011. It was time consuming but that worked. Trying to list items on dial no way in today's world unless you had like multi-varation product you sold over and over again.
Earthlink dial-up internet 
- not earthlink but a different service
