Those who bought shares a long time ago couldn't have seen this coming, so the only thing they can be blamed for is investing in something that isn't profitable at all. Those who invested very recently are just dumb.
If you know that a potential mining ban is looming in China, which has been like this for more than a month, you obviously should avoid using ViaBTC or any other actual mining farm in China to start cloud mining.
If you proceed with it without doing any research, you're just asking for it.