We all know the VAST majority of cases settle. Therefore no one is being misled regarding possible court outcomes.
EDIG is not involved in a single case but rather 170+, and the fact remains, they are 10 for 10 currently.
Yes, past results do not guarantee future efforts but with a 95% rate for settlement for IP infringement cases, that is a rather easy bet.
It's not a matter of if they make money defending their patents, but rather, how much they will make, IMO.