Maybe. But if there were 10000 sent and 500 responses, that still isn’t enough information. You would need to know how many were even handled and perceived by the intended recipient.
But maybe you can work around this by canvasing in person rather than fire and forget.
Some music gear got stolen from my van parked in my driveway.
I called the cops the next day, they came over and took a report and told me nothing ever gets recovered.
Then I called around the music shops to report serial numbers and stuff. Within a day I got most of my equipment back, especially the expensive parts.
But the cop who took my report for some reason was tasked with doing the recovery from the second hand store, and he was really mad about it.
That was about 12 years ago, and since then I have come to the conclusion that I would only deploy police in conditions where I would be willing to deploy lethal force which is almost never, and ideally probably never.