I bought a yearly package after listening to rave reviews and almost immediately felt remorseful. It’s feels like an abandoned product.
I loved Pinboard, too. (past tense) I was an early adopter and paid for lifetime access - an option that was available at the time. Now, the API is often down so my native clients I use on macOS and iOS are useless.
Sadly, I've moved on. Espial seems to fit what I need.