It is a for-profit idea, but we promise we'll never clutter up your presentations with tacky ads. We currently only have small ads on the right for our own products. We may do other ads there in the future, but we promise they will be tasteful.
We have a lot of other ideas for monetizing it with premium and event-related features. But everything you see on Speaker Deck today will always be free.
Is Speaker Deck a for-profit idea, or is this a side project for Ordered List? I'd hate to see this turn into SlideShare: a hopeless mishmash of tacky ads.