Raindrop.io is a great service, but it also has a number of glaring flaws and deficiencies. It also uses a subscription model for premium features, which implies the developers intend to keep working on it and improving it (otherwise, why would we keep paying them).
Unfortunately, I haven't seen any progress made since I subscribed, nor any signs of active development or engagement with the community. That's unacceptable. If Raindrop wants to keep charging a recurring fee, and expects people to pay it, then the devs need tell us what they're up to, so we can feel we get our monies worth.