I find it quite surprising how little users pinboard actually got overall. But on the other hand - most of them are premium customers.

Maciej I'm curious is this endeavour profitable for you? I understand the point of an itch that needs to be scratched and all. But still I'm curious - I find the service excellent (I'm a devout customer) but for all the resource intensiveness that your service requires to offer caching and search and the time sunk into implementation and maintaining, well I find the fee kinda low (on a over thumb estimate that is).

Are there any other ways you are monetizing this? Since all those bookmarks are true "human powered search engine"?