The bad thing lately is that a developer or agency buys one module and wants to install it on more than one domain. I have received negative feedback for not publishing my modules on addons. I have them well protected against abuse on multiple domains. I'd rather not have 1 cheater and lose 10 purchases. One thief can rob me of 100 licenses (if it's an agency or a developer)
Edit History
The bad thing lately is that a developer or agency buys one module and wants to install it on more than one domain. I have received negative feedback for not publishing my modules on addons. I have them well protected against abuse on multiple domains. I'd rather not have 1 cheater and lose 10 purchases.