I understand. I think the reason why they charge more for lossless is the additional bandwidth required to download them. Cloud host providers charge based on bandwidth, so they pass that cost on to buyers. I do know 320k VBR is usually undesireable, sometimes converting a 320k Mp3 back to WAV can cure some problems with frequency loss and artifacts... I don't know the specific answer to your dilemma, as flac formatted files are not usually something I use. Best of luck though! :/