Cynical mode: The law suit would be very expensive, but imho. possible to get to the next round. This elevates for several instances, until you're out of money and the lawyers can burry it.

And, if it came to a lawsuit, you'd be up against Amazon, Facebook and Google all at once (among others).

You can choose your battles. There's no need or obligation to take on all targets, and the legal strategy of first pursuing a tractable, or even sympathetic (to your interests) target is well established.

The cyberstalking industry has many players. Most are small. A target-rich environment.

Shifting the investment or financing calculus, via increased investor risk, possibly including legal liability, would be huge.

So we need an organization like EFF for that.