The initial release of exclusives included a Fin Fang Four story by Scott Gray and Roger Langridge, Marvels Channel: Monsters, Myths and Marvels by Frank Tieri and Juan Santacruz, American Eagle: Just a Little Old-Fashioned Justice by Jason Aaron and Kid Colt by Tom DeFalco. Digital comic exclusives would be broadened to include non-event comics. This was released online first as a tie-in with the Secret Invasion event. However Marvel Comics modified this policy in 2008 with the release of Secret Invasion: Home Invasion. In response to fears from comic sellers, Dan Buckley promised that there would be at least a six-month delay from when a comic is published in print and when it is made available on Marvel's Digital Comics Unlimited. A small portion of the library was made available for free in an attempt to entice viewers to subscribe to the service through either its monthly or yearly plans. Unlike earlier initiatives, Marvel Digital Comics Unlimited was a subscription service with over 2,500 comics available to subscribers, with new comics added on a weekly basis.

Marvel's Digital Comics only grew modestly, reaching over 24 comics in April 2006 until finally it relaunched in November 2007 as Marvel Digital Comics Unlimited. At this time, Editor-in-chief Joe Quesada speculated on the possibilities of adding animation to the comics, which would be realized in 2009 with the release of Spider-Woman as a motion comic.

Marvel Digital Comics was first announced in 2005 as a replacement to its DotComics however, it utilized the same Flash-based interface with only minor updates, while decreasing the comics available from 12 issues to 4 issues. This would grow to a size of dozens of comics by 2002, but would later be limited to a mere 12 comics by 2004. This was later replaced by DotComics under the tenure of Bill Jemas. Marvel first began releasing comics over the internet in 1996 with Marvel CyberComics. The service launched on November 13, 2007, and now has more than 30,000 comic book issues in its archive. Marvel Unlimited, formerly known as Marvel Digital Comics Unlimited, is an online service by Marvel Comics that distributes past issues of their comics via the internet. Monthly or annual subscription required to access content

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