I've been trying to get this sorted since SEP 2. I've read pretty much all of your comments and I gotta say, some of your questions have been addressed by SE. Well one of them. If you are sharing a CC with someone else, you are much more likely to get an error. SE stated this(I don't exactly remember where because they have 213095209345 websites). The CC will be charged to one account, but not the other, resulting in an error and forcing a block on the account. Do NOT use the same CC for multiple accounts. I guess it's one of their counter-measures against RMT.