
All the law does is declare that by having affiliates in CA, you have a presence in CA and must collect and remit sales tax to the FTB/Treasury. Since Amazon discontinued their affiliate program, it means that Amazon does not have to collect or remit sales tax. Amazon is unaffected, but the affiliates and the tax money that came from the commissions under the program has been affected, due to these tax law changes.
I'm astounded by the amount of misinformation being passed around here on this thread.
Then there's this, of course: "California's new requirement will generate badly needed state revenue and send a signal to Congress that "we want to see a national solution" to the issue of taxing Internet sales, Dombrowski said."
Cited from the OP's link.