@Ryan - I'm all for opt-in rather than opt-out and I can understand the reasons behind opt-out being the default choice but it doesn't sit well with me when software makes choices for me unless I explicitly allow that to happen.

@Andrea_R - I think there would actually either be a plugin which does what greetbox does but with no ads or someone would simply rip out the ads in greetbox and re-release the plugin. consumer gets free goods but producer still gets paid somehow. That is where the conundrum lies.