I already pay for Readwise Reader, which can sync with Pocket, so Pocket is already backed up there. Reader can also sync with Instapaper, so I think from now on I’ll just use Instapaper (free version) instead of Pocket. I also really like ReadKit, which can also sync with both Pocket and Instapaper, so using Instapaper seems like a good Pocket alternative for now. (I also use Zotero but only for academic stuff.)
