This, but unironically

“We just run our business like a business,” he said. “Whether you’re selling cakes or causes, it’s all the same.”

Dees was as successful at selling causes as he had been at selling cakes. Fueled by Dees’ direct mail campaigns, the Southern Poverty Law Center brought in million after million. Last year it took in $136 million, and it now sits upon an endowment of nearly half a billion dollars. Yet even after some within the organization thought it should stop raising money, and despite promises by Dees that it would do so, its fundraising pitches in the mail became ever more desperate and frantic.

...

Sometimes all of this became downright grotesque. In the 1980s the SPLC sued the Klan over the lynching of Michael Donald, and won a $7 million verdict for Donald’s mother. The Klan, however, had by this time diminished to almost nonexistence. Its sole asset was a warehouse that was sold for $55,000, which was all Donald’s mother got. She apparently used a large portion of this to pay back an interest-free loan that the SPLC itself had extended her. Afterward, the SPLC began using photos of Michael Donald’s corpse in its fundraising letters, raising $9 million off the case. Donald’s mother evidently saw none of this money, though when she died barely a year later Morris Dees was quoted in her obituary praising her bravery.

None of this is talked about in that book though, he just called them commies for trying to censor conservative free speech:

The SPLC started monitoring “hate groups” back in the 1980s. They began with the Ku Klux Klan and similar white supremacist terror groups, suing them into bankruptcy. Yet after easily defeating these real hate groups, the SPLC went on to target ever more mainstream organizations, mostly on the conservative side of the political spectrum.

He says that like it's a bad thing...