Pinboard

Don't ever sign up for the 7-day trial. It's basically a scam to trap your money - the support is unresponsive via e-mail and twitter, as many have stated here already. Maybe the author isn't doing that for the money itself, it just seems that he doesn't cares anymore, as the Pinboard Twitter is only used to discuss politics and there is no sign of product improvement. The product itself looks OK but I believe that there are many better alternatives.

I have been using pinboard for over 5 years. It's great and practical.