I don't think I've ever met anyone who liked getting calls from telemarketers. More often than not, the call is disruptive and they are selling you things you don't even want. It actually annoys me to no end, but there is a little part of me that always sympathized with the person who has to go down a list trying to sell something to people who don't even want it in the first place.
Marketing is a tough business anyway, from what little I actually understand of it. So, it makes sense to me that everyone would just be happier if that list was much more focused on people who might actually be inclined to buy the product or service. So, for businesses (especially new ones) that must face the necessary evil of marketing, their best bet is through a defined demographic of potential customers to sell to. To help with this is List Giant.
List Giant is pretty much what it says on the tin: A list provider.They help you narrow down and focus your marketing lists, whether or not your business is old or new. It's not just telemarketing either, it's every other medium of advertising that people can get easily spammed with if they don't and never will want your product--mail and email. The lists that they can provide will help you send your advertisements to people who will be less likely to hit "delete," hang up, or use your flyer to line the bottom of a bird cage.
List Giant, to me, is more about annoying fewer people than it about making sales. It's just a waste of time and resources to send randomized advertisements.