Do NOT rely on these miles to extend your Skymiles expiration date! This is not partner related and DL will cancel your account for inactivity...no mercy, learned this the hard way for my wife's account a few years ago...all those 10k Skymiles for an online DL registration (was it Dash for miles or something like that?) went poof and tried in vain to get them to relent but they showed no mercy!