Feedback is extremely important, even negative/dissatisifed feedback, so if you agreed to be contacted, then you should expect to be contacted. Spamming people

Feedback is extremely important, even negative/dissatisifed feedback, so if you agreed to be contacted, then you should expect to be contacted. Spamming people? (i.e. without consent) No, never. It just makes people angry. On the other hand, if people agree to receive messages from you, then by all means, contacting them can be mutually beneficial. For example, you said you "didn't get" their app initially, but there's a chance it does exactly what you need but they failed to communicate that to you. Figuring out where they failed, and figuring out what you want (so they can provide it), is beneficial to both. If you're curious, you should read just about everything from Patrick McKenzie (hn:patio11) on his blog: http://www.kalzumeus.com http://www.kalzumeus.com