The best approach would be to put the harrow advertisement when installing the capistrano gem. Something in the lines of: "hey, if you want to support our work check out Harrow, we think you'll like it. `gem install capistrano-harrow`".
Please excuse the stray line numbers, but here's what the output looks like [1], the prompt respects the presence of a tty and defaults to no after a few seconds, and the prompt is only visible when running "cap install" (not "gem install capistrano")
Almost certainly this dependency will go away soon, not because of the negative comments on HN, but because silly as it sounds, I don't really like it anymore than anyone else does, I just need to apply a little pressure and see if the product we tried to build will find it's place in the market or not.
[1]: https://gist.github.com/leehambley/7c18c9760e5ec81f5181c018f...
This does not sound like a great marketing strategy, more like a formula for pissing off users.