Curves can also look like that if we look at them at the wrong scale, so maybe it's too soon to jump to conclusions. There are more questions to ask: how many

Curves can also look like that if we look at them at the wrong scale, so maybe it's too soon to jump to conclusions. There are more questions to ask: how many people have heard about gittip? If they're not donating yet, would they reconsider if they read this post ("social confirmation")? How about if you served them other specific calls to action? How many more haven't heard of gittip yet? Are those two orders of magnitude in there?