Saves
Saves is the service type where delivering accounts bookmark a post, an engagement that is private to each account and visible to you only in the post's own analytics.
Saves are bought on the belief that platforms treat a save as a stronger signal than a like, since it suggests someone wants the post again later. Whether that holds, and how much it is worth, is decided inside ranking systems nobody outside the platform can inspect, and it can change without any announcement. The order itself is simple: a post link, a quantity, and delivery from whatever pool the supplier uses.
The awkward part is measurement. The save count appears only in the post owner's analytics, and on most platforms only when the profile is set up as a business or creator account. The panel cannot see it, so there is no start count read from the platform and no arithmetic the panel can run on a refill request. Anything you claim has to be supported by what you record yourself, before and after, and analytics often update on a delay long enough to make an early complaint useless.
Losses are equally invisible. An account can unsave a post, or be removed entirely, and nothing marks the difference except a figure that quietly stops matching. Check the service terms for whether saves are covered by refill at all, because several panels exclude them for exactly this reason.
A number nobody measured
Nobody has shown an intention to come back, and the panel measured nothing. It is a number the supplier reports and a number you read in your own analytics, and where those disagree there is no third source to settle it.