Unfortunately, I don’t think the postcards really worked. We sent them to various regions across Germany, but my guess is they ended up in a pile at the campground reception and never reached the actual owners.
That said, we manually scraped around 500 campgrounds near us, designed postcards that highlighted CloudCamping’s key selling points, and sent them out using a different mailing service. Since we didn’t hear back from anyone specifically mentioning the postcards, I assume they didn’t convince anyone in the end.
Still, it was a fun experiment, and who knows, it might work better in a different context!