…from a business perspective, account limits like Basecamp has for the number of active projects can be a double-edged sword. On one hand it’s an opportunity to upgrade customers and have them pay you more money each month. On the other hand, it forces customers to revise their position, and if you’re not doing a really great job, it can prompt them to question the value of an account they may have otherwise carried on using for years.
(via Moving from Basecamp to ActiveCollab – All in the head)