Why Oculus had to sell out? I can't imagine them running out of capital. In current bubble market they should have VCs lined up outside their office if they wan

Why Oculus had to sell out? I can't imagine them running out of capital. In current bubble market they should have VCs lined up outside their office if they wanted. I'm unable to think any other reason then plain old cashing out. Did FB used some backdoor to snap them or they actually willingly submitted themselves to cash out?