"offering a product and then suddenly it vanishes..."
Lidl in the UK has 'specials' where they promote, say, Italian produce, then it disappears. And when it's done, it's done. Basically one pallet of this, and one pallet of that.
A month or so later it might be French produce. Or Spanish, etc. Pretty much the same set up as Easter displays, or the Christmas produce. Although the Christmas stuff generally seems to linger a little longer on the shelves - more of it, I think.