It doesn't make sense at all, because this encourages people to destroy these kinds of things whenever they find them on their land. If you find treasure on your land and you report it then the government comes in and basically takes over your land for a while. They want to let archaeologists investigate, but you usually don't get much compensation. If you rely on that land to make ends meet then it's a bad idea to report it.
I think the rewards need to be high enough that people want to report these.
I think the rewards need to be high enough that people want to report these.
Edit: there was that case in France where a farmer found a rare mastodon skull and didn't want to bring attention to it because he didn't want amateur paleontologists on his farm: https://www.livescience.com/63060-farmer-finds-mastodon-skul...