Products get cloned almost immediately once released in the Chinese domestic market, especially when there's a potential for them to make money. It's about keeping the IP as closely guarded as possible while attracting users.

Companies are very conscious of copying and they see open source as only facilitating that - the cons outweigh the pros. Tech savvy consumers don't appreciate that a company has open sourced some of its work because there's no culture of open source, and the act of open sourcing only allows competitors to rip something off easier. Why would they?