Marketing software is really hard, as others have mentioned, due to switching costs, the number of niche verticals, and user to user requirements. I also notic

Marketing software is really hard, as others have mentioned, due to switching costs, the number of niche verticals, and user to user requirements. I also notice that in the past few years, there are a flurry of new products in this space offering lifetime deals as well. This makes it so that a traditional saas offering needs to incorporate some sort of up sell later on.