Among the many Kickstarter games that were successfully funded, there are at least three that fall under the category of online card games. As of last count, a total of 14 proposals have been received. Out of this number, 10 failed to get their funding goal and 1 still has an ongoing funding campaign. Three out of fourteen is good enough, considering that there are many proposals as well for various gaming forms.
Here are the three:
CHROMANCER Adaptive Strategy Online Trading Card Game