What I ultimately plan to do with my website will partially depend on its success, but it is not something I foresee myself owning for any more than 10 years. In about 5-10 years time after opening, I will probably step down from the role as CEO/owner (a grander term than it really is for a business this small). While I don't want to completely step away from my website, I wouldn't mind simply assuming a smaller role for the sake of maintaining the feel of the website, eventually fading out (unless the website does first). Knowing myself, I come up with new ideas pretty frequently, so I won't want to work on the same project forever.
Honestly, I was in the chunk of people who hadn't even considered an exit strategy for their venture, but I'm glad I see the wisdom in planning one out now. It hasn't really influenced much of my business decisions yet beyond making them feel more real. I suppose I've taken the lifespan of my market into greater consideration.