it gives also 15% more points when flying on SK flight number (and perhaps SK metal is also required). With a cheap ticket, instead of getting 200 points you get 230!
on AF/KL, silver gets 50% more points on ALL Skyteam flights (at least). Those are not qualifying but that is quite a good boost to get awards a lot faster. No lounge access though but Gold is not really hard to get, it's 15 return trip Paris-London even in very cheap eco ticket @ 120 EUR each. (or 8 return trips Paris Copenhagen via Amsterdam... or 5 cheap AZ return CDG MXP FCO ATH
