Mr Lancaster said a $27 million limitation fund paid to the Government last year scared off people who preferred to seek compensation through this rather than through the group.
The limitation fund was established in September last year by Rena's owner and insurer, Daina Shipping Company and The Swedish Club. A similar fund was established by the pair in July following a court order this year, offering claimants further compensation with a liability limit of $11 million.
The Rena Business Compensation Group formed in March 2012 as a way to help small businesses unable to afford legal help on their own.
Iwi representative Buddy Mikaere said iwi were still waiting to hear back from the Waitangi Tribunal after lodging a claim in September against the Crown to establish why it had so far failed to enforce Rena's removal.
Daina and The Swedish Club are directed to state their intention of leaving Rena on the reef, or not, to the Environment Court by November 29.