Spam costs the sender very little to send most of the costs are paid for by the recipient or the carriers rather than by the sender. There are two main types of spam, and they have different effects on Internet users. Cancelable Usenet spam is a single message sent to 20 or more Usenet newsgroups. Usenet spam robs users of the utility of the newsgroups by overwhelming them with a barrage of advertising or other irrelevant posts. Furthermore, Usenet spam subverts the ability of system administrators and owners to manage the topics they accept on their systems.
Email spam targets individual users with direct mail messages.
Email spam lists are often created by scanning Usenet postings, stealing Internet mailing lists, or searching the Web for addresses. Many people those with measured phone service read or receive their mail while the meter is running, so to speak. Spam costs them additional money. On top of that, it costs money for ISPs and online services to transmit spam, and these costs are transmitted directly to subscribers. Sometimes, site partners and end-users contact us asking why they received emails from Everyone.net or its affiliates.