Originally Posted by speed.skater

Sorry if this is somewhat basic. New to Skymiles (currently doing the PM challenge) and based in Europe, flying AF/KL eco for the most part, with the occasional DL and UX thrown in.

Are there any pitfalls I should be aware of when purchasing upgrades (e.g., during OLCI)?

I'm asking because in the past, it happened to me occasionally that upgrades did not yield extra status miles (that's almost like the norm on OW) or didn't even yield the status miles of the original booking class (e.g., when upgrading SAA and crediting to M&M).