Bulk mail is on the order of half the retail price of postage. So it is still a big part of their revenue. And you can get the commercial discount rate by print

Bulk mail is on the order of half the retail price of postage. So it is still a big part of their revenue. And you can get the commercial discount rate by printing your own postage at home for one off packages. If you are mailing 100+ things a month, presorting them etc, you can pay bulk rates too