I use a prepaid Mastercard from neteller.com. You get a virtual card with your name on it, or any random name that you fill in when registering. There's all sorts of ways to top it up, but limited to (I think) € 450 for an unverified account. To verify you have to submit your ID and then there's no more limits. Or get a new unverified account with a new email address.
Yes, Lia's skin has cleared up completely, but I still have no trouble telling them apart.
For reasons unknown to me however, they switched sides of the bed yesterday. Now Mia is near the wall and Lia near the camera. I think they're trying to confuse us.