When looking at everything she's shared so far vs. her revenue, you could say she's being smart by withholding complete nudes for now. It's a little frustrating if you're a die-hard fan of hers, but she'd probably burn out quicker if she were to put out everything she possibly could right away. I wouldn't be surprised if she had in mind the classic step-by-step plan of milking her fame for as long as possible.
She's on step #1, and she's made over a million without nudes, so I'm assuming once the income starts to finally taper off, that's when she'll refine the quality of her content and bring out the big guns, so to speak, and create a 2nd boost of attention by posting full topless pics. She'll ride that for a while, and once that market dries up, that's when she may drop full bottomless pics for a 3rd boost of cash. Once fans get bored by that, it's possible she'll then produce solo/masturbation content as a 4th step and then follow that with finally producing full BG and/or GG scenes as a 5th step.
We'll see soon enough, but the more money she makes now, the less reason she needs to go any further.
It's kind of like when music groups spread out their best songs over multiple albums in order to make the fans buy all the albums, which are then followed by the inevitable greatest hits album, the live album, the unreleased studio tracks album, the box set containing all their tracks and on and on and on.