I know she has a lot of cards, but what's up with the previews pushing her so hard. I just got 3 of her cards in a row in the preview section today and another 2 in a row a little later. With all of the models on this platform, I don't understand how that happens?

The previews show a random selection of cards rated (in my experience) between 4.60 and 4.74(?). Many girls get the same rating across their cards (half of my previews seem to be Katya Clover and Melissa, even though I don't buy ther cards). It's definitely not entirely random, but I doubt it's as tricky as using some form of enhanced learning to judge what you'd like based on your last purchases.

It would be a nice feature if the previews would stop showing me previews that I deactivated.

It would be a nice feature if the previews would stop showing me previews that I deactivated.

I second that!