You can always report them to these agencie's.
They take a while to get to your complaints but it may be the only avenue since they seem to be so arrogant about what they owe to webmasters.
http://www.ftc.gov
PH: Phone complaint center 1-877-382-4357
IFCC:
http://www.ifccfbi.gov [on line submittle only]
Also file a complaint with the local FBI in the town they are located in.
I think with all the people that are owed these agencies will take note and maybe an investigation could be imminate.
Pursueing a lawsuit will cost you ALOT more than is already owed to you or others and this is probably the reason they are acting the way they are. They know you wont sue so you are stuck with the catch22 situation.
They wont act so arrogant with the agencies listed above. I don't use ibill so I don't know the full story...execpt that alot of people are being misled with promises of owed money and thats not right.
Good luck to all that are owed money.