Spend the sample on an ordinary post rather than the one you care about, so you can accept the reading.
The quality of trial services may differ from paid ones — the free trial is there to show you how it works.
Need more, and instantly? Buy Instagram likes
The sample goes to the post the account holder is proudest of, and the result is then judged by whether the post felt different afterwards. At twenty units nothing will feel different. The sample is a wiring check: it confirms an order placed at this address arrives and registers publicly, and that is the whole claim.
If the two numbers differ by roughly what you expected, the route works. Whether a larger figure would change how the post performs is a separate question, and one a post with weak retention answers badly at any scale.
Short answers to what people ask most before ordering.