Customer loyalty programs for Internet Service Providers (ISPs)
By Michael Lowenstein, VP and Senior Consultant, Customer Loyalty Management, Harris Interactive
SearchCRM.com
My suggestion is to review ISP material in sources like Frequency Marketing's Colloquy archives or obtain The Customer Loyalty Report, a compendium published by The Wise Marketer.
Also take a look at this article from CLEC marketing that discusses telecom-specific loyalty solutions, focusing on one company that created a loyalty program that encourages customers to accrue points through spending, upgrading and referring new customers. The company allowed points to be redeemed for a range of rewards.