1. No QP
2. No QP, no points for 3rd party flights. HOWEVER, your example, LH984 is operated as LH wetlease, and for points earning purposes, it is treated as if it's operated by LH. See http://www.facebook.com/Lufthansa/po...6505112724596/
3. It's the operating carrier that matters
4. It doesn't make a difference. Flights need to be operated by M&M integrated airlines.

https://www.miles-and-more.com/de/en...nt-system.html

Edit: No idea why forum broke the facebook URL... :/