Sen. Elizabeth Warren (D-Mass.) and Congresswoman Alexandria Ocasio-Cortez (D-NY) want to know why crypto companies, like bankrupt crypto lender BlockFi and stablecoin issuer Circle, banked at now-collapsed Silicon Valley Bank.

The two Democratic lawmakers are looking for more information on what they call the “mutual backscratching dynamic” between SVB and venture capitalists, in which the bank treated VCs and other high-rolling depositors to extensive lines of credit and luxurious “white glove” services like “industry ski trips, conferences, and fancy dinners.”