Now, if they were to systematically offer 10% to whistleblowers and full anonymity , I am sure they'd collect even more.
They have a pretty active whistleblower program. The largest award so far was $30 million, paid out in 2014.
http://www.sec.gov/news/pressrelease/2015-150.html
"Whistleblowers who provide the SEC with unique and useful information that contributes to a successful enforcement action are eligible for awards that can range from 10 percent to 30 percent of the money collected when financial sanctions exceed $1 million. By law, the SEC protects the confidentiality of whistleblowers and does not disclose information that might directly or indirectly reveal a whistleblower’s identity.
Since its inception in 2011, the SEC’s whistleblower program has paid more than $50 million to 18 whistleblowers, including a more than $30 million award in 2014 and a more than $14 million award in 2013. All payments are made out of an investor protection fund established by Congress that is financed entirely through monetary sanctions paid to the SEC by securities law violators. No money is taken or withheld from harmed investors to pay whistleblower awards."