On a quieter service a small batch is easy to see, which is the one advantage worth using here.
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Where a platform carries less traffic overall, twenty units are proportionally larger and therefore easier to attribute. That is genuinely useful: on a crowded service the same batch disappears into ordinary movement and the reading tells you nothing. Here you can usually see it, which makes this a better place to test a route than to build one.
Note the figure and the time before ordering, leave the upload untouched, and check once the following day from a browser where you are not signed in. Reporting on smaller services tends to be slower rather than faster, so the wait is not optional.
What you learn is that the order reaches the correct file and registers. What you do not learn is whether anybody on this service was ever going to find it, which is a question about the catalogue and the audience rather than about delivery.
Short answers to what people ask most before ordering.