V and L also fall into 50% miles earning bucket. Did a quick calculation and your getting 1350 miles(give or take). When you fly you will get 1350 in a pot towards your status (silver,gold etc) and 1350 miles into a pot to redeem on flights,car rental,hotels and so on. BD silver is ok and will award you some nice comforts when flying BD (lounge access,priority boarding). For me its the VERY generous redemption rates that is the main draw for diamond club. Keep an eye out for some almost ridiculously generous offers to earn destination miles. Sign up for the bmi credit card and bag 20k miles, there was an offer early this year where a £12 magazine subscription got you 9k miles. Ps sorry for this all being a bit bunched up but im writing this on my mobile phone and it wont let me use paragraphs.