Originally Posted by
LH4116
I'm quite sure it was UA who made the decision to cut mileage accrual on the cheap fares, not TK...
Nope - the earning rates are set by the operating airline with very few exceptions.
For example, the same restriction applies to these G fares if crediting to LH (I didn't check others but you can see the principle):
http://www.miles-and-more.com/online...l=en&cid=18002
It is not possible to earn miles in booking classes G, P, W, Z (and worldwide V).