Near the end of his career Marcis landed the first major Internet sponsor in Winston Cup, Prodigy Internet. This company sponsored Marcis as an associate and primary sponsor between 1994 and 1996, to where at the 1996 Daytona 500 Marcis was able to display a showcar, a first for his career. Marcis had a horrific accident at Pocono in June 1999 when, after getting loose in turn two on the 91st lap, he overcorrected it to the right and slammed the wall head-on at a high rate of speed, sending his car airborne and completely destroying it. He climbed out of the wreckage without injury. Marcis was frequently the test driver for the Richard Childress GM Goodwrench No. 3 of his friend Dale Earnhardt during the prime of his career. This agreement with Childress was made by Marcis to help fund his own race team, although he rarely had the time to test his own equipment.