In other words, their real business model, the reason that they can be considered a "safe investment" is that they operate as an extortion racket at scale with the justice system itself as their (free) muscle.
1. You buy "litigation insurance."
2. You state that you are insured on your website.
3. The insurance company is required to defend in all patent cases that arise, so there is no doubt that you will be represented in court.
4. Nobody sues.
5. The insurance company makes a profit with no cost or risk.
I have no experience with this, and the only time I've gone and tried to get quoted for things like cyber liability, etc, the costs are incredible relative to the value of the business and revenues.
A patent troll will take a look at such a policy and do the bare minimum to give off the appearance of a ‘real’ company.
And then the insurance company will simply go “yep, that tracks”, with little incentive to investigate as it’s not in their best interest.
Probably ineffective too, as some part of your firm must hold the assets, and that's the part that gets sued
Send out 1,000s of dubious demand letters which don't cost much. Some percent of those will settle with minimal effort on the troll's side. Profit.
Drop the ones that look expensive and hope they don't counter sue.
In some countries you can sue for "unjustifiable threats to begin patent infringement proceedings", but I was also thinking things like filing complaints with the relevant Bar associations. That sort of thing.