Lead Generation companies acquire lucrative leads in a number of ways, and using the Internet is only a part of their operations. They might buy leads from a sister business. Like, the customer list of an insurance company could become a potential list of leads for a credit card company. Lead generation companies do buy and sell leads that way. This way, they also get fresh leads to give to the companies. Some lead generation companies also give guarantees on how many of those leads can be converted into business, and they might even handle that part of the operation.