Now that's what call as "Backfire". His Reddit AMA is filled with comments on this single comment about open source.

How big is your team size?. By the way its a cool idea !.

just two, me and the OP

I have been using this tool for a while. A prefect collaboration tool for Gmail Attachments.

Thanks a lot! I'm the founder and would love to hear about how you like it. We're constantly improving the extension and thinking about how we could add value to the much abused email attachments. :-)

If the UI of tree is just like in that http://causehub.io/words/introducing-whatleadsto , I feel it little bit cluttered..)

Otherwise its nice idea.