Lawyers specialising in handling IP cases would probably have an interest in such a service though; potentially far more work for them than agreeing with the client that settling probably is the cheapest option. Insurers underwriting intellectual property liability insurance (it exists!) also have a very strong incentive to encourage, or even require their clients to use such a service.

And for some non-software industries many firms might have a pretty good idea which competitors/suppliers/clients of theirs are likely to be threatened by the same patent.