Join Date: Aug 2011
Location: Barcelona, London, on a plane
Programs: IB+ Gold, TK E+, Hyatt Globalist, Marriott LTP, IHG Diamond
Posts: 14,200
Cat 1-4 certificates as a mattress run are a quite expensive way to do it... A cheaper mattress run would probably be worth it thanks to the 3k bonus points.
+1 for just spending more on the card.