"Trust us, the count is fair" is exactly what an unfair count says too. A contest is only credibly fair when a doubter can check it without your help.
PollMaker.ai makes that possible. With an Event Pass, each vote is linked into a tamper-evident tally chain. Publish the log at the end and anyone can recompute it: confirm the total, confirm no ballot was inserted, removed, or reordered, and confirm the number you announced is the number the votes produced.
The point is not to insist the contest was clean. It is to let everyone see that it was.