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Pinboard was a clone with a different business model: users actually paid for it.

Fast forward, and delicious died, only to be acquired by — you guessed it — Pinboard [1]. Because Pinboard was actually serving its paying customers, it just kept trucking along.

[1]: https://blog.pinboard.in/2017/06/pinboard_acquires_delicious...

delicious launched before Pinboard, IIRC. There were a number of such services.

try it out. del.icio.us