You're right of course -- I didn't mean to imply that you should use cost-plus pricing as a baseline, rather, that you should definitely not do anything BELOW c

You're right of course -- I didn't mean to imply that you should use cost-plus pricing as a baseline, rather, that you should definitely not do anything BELOW cost+, regardless of how much (or little) value you might be delivering to your customers. That said, there are numerous examples in which even this rule can be thrown away (Facebook, Twitter, et al.)