What a resole actually costs
A welted boot takes four. A cup-soled trainer takes one, optimistically. The construction decides it, not the price.

A Goodyear welt sews the upper to a strip of leather, and the outsole to that strip. The upper is never stitched to the outsole directly, which means the bottom can be cut away and replaced without touching the upper. Four times, on our midsoles, before the welt holes run out.
Blake stitching runs a single seam through insole, upper and outsole together. It is lighter and more flexible and it gives up a resole: three, because each new seam needs fresh material to bite into.
A cup sole resoles once. We put that on the product page, not in the returns policy.
A cup sole is a single moulded unit, glued and top-stitched around the perimeter. Removing it destroys the stitch holes in the upper. We quote one resole and we mean it as a ceiling, not a promise.
The first resole on any welted pair is included at eighteen months. That is not generosity — it is the point at which we want the shoe back so we can see how the last performed.