OT: Soon to be seen where LH sen and/or AF plat will be comped to...
Well, for the SEN you got (could have gotten) KLM plat last year...
A theoretical chain in 2010-2012 for a true collector starting from zero level
Sign up for BD *S (or was it 2010 they gave it away?)
Ask for BD *G (they comped if you had a booked flight with them, even without it)
Comp BD *G to MA Gold
Comp MA Gold to LH SEN (there were several local campaigns, also in HU)
Comp SEN to KLM Plat
Comp SEN or KLM Plat to AB Gold (2011)
Comp MA Gold to AB Gold (2012, if the previous expired)
Comp any of the above to SK *G (present campaign in China)
So without flying (or flying once with BD) you could end up with 2 OW Sapphires, 3 *Golds and 1 ST Plat.
Of course this is 20/20 hindsight