Cable companies, youve been put on notice. Cord cutting — ditching your steep monthly cable or satellite bill and instead watching video online — is on the rise, according to a new report from Experian Marketing Services. In fact, some young adults may never even pay for cable TV in their lifetimes. The percentage of cord-cutters, which Experian considers people with high-speed Internet whove either never subscribed to or stopped subscribing to cable or satellite, has risen by 44 percent in just three years. In 2013, 6.5 percent of households in the U.S. …