New individual accounts receive 25 lifetime free Tack saves with no credit card or time limit. The 25th successful save is included. Failed saves, repeat requests, and adding an already-saved Tack to another Stack do not use extra saves.
Once the lifetime allowance is used, membership is required to explore Discover, search for new Tacks, view unsaved Tacks through direct links or other people’s shared Stacks, or save more. Your saved Tacks, their source links, and your own Stacks remain accessible. Deleting never refunds a save or reopens discovery. Existing-member, complimentary Source, and owner/admin exemptions are preserved, and former paid collections are never truncated to 25.
Full discovery will require a qualifying signed-in account; signing out will not bypass the rule. Marketing and limited Homepage Picks previews stay public. Account, membership, Help and privacy controls remain accessible.