In case you haven't heard, slacktivism (sorry for misspelling it earlier as slactivism), is the term used to describe those who support causes and organizations through social media and internet tools. For example, a Facebook user who becomes a fan of the Susan G. Komen Foundation is a slacktivist. A friend of that user who 'likes' the status update is also a slacktivist.
But according to a great article in the Buffalo News, the term is also used to describe someone who donates to an organization via the internet. Kiva.org is an example of a site where users can donate as little as $25 to fund entrepreneurial ventures halfway around the world (if you check out this site, join the "Stuff You Should Know" team - great people involved there).
Slacktivism counts because it allows anyone and everyone to get involved in the things they care about. By getting involved, I mean everything from sharing or clicking a link to donating time and money. The littlest involvement used to be a dream come true for marketers - word of mouth! Now, that's become the easy part... today, it's about turning slacktivists into customers, donors, and volunteers.