I must admit, the difference is hard for me to see. Though the tech companies may not be getting rich directly off the backs of the poor, they are just as destructive in funneling large sums of money to a subset of society.
Guess who actually clicks on ads? Guess who allows for advertising loans up to 35% APR? That definitely falls within usury/payday/predatory loan range. The 36% restriction would only exist because people actively fall for those scams, and it also indicates Google is ok with people falling for the 35% rate.
I also remember them recommending a payday loan company, but I can't find the link.
TL;DR Google is rich off people who can't tell they're being scammed.