I'm currently slightly confused by the percentages and 500PQM minimums:

On a 50% PQM earning fare on Swiss/LX, should the minimum earning still be 500PQM (as opposed to 250PQM)?

The United Swiss Partner page states "Premier members earn a minimum of 500 Premier qualifying miles on all eligible purchased fare classes" which suggests that it should be 500PQM, regardless of percentage - however I've actually been awarded less in practice:

I was awarded only 295PQM on a 590 mile K-Class (50% earning) flight, even though I'm a Premier Silver. I did get the expected 500PQM on a 46-mile SAS flight (a connecting flight on the same booking, it was credited 1-2 days before the Swiss flight was credited).

(I'm aware that 125PQM/250PQM minmums exist for other airlines - but they appear to be explicitly mentioned on the partner pages from what I've seen. E.g. the United Air Canada partner page states 500PQM minimum, except on S,T,L,A,K, i.e. the 25% fare classes. The Swiss page however doesn't mention different minimums for their 50% classes.)