It's possible they're eating the cost of the load balancing necessary to multiplex from their backends to client requests, which should theoretically stoke an increase in business due to reduced switching costs (and what timing, with an economic contraction likely pushing cost reductions at those needing cloud storage).
Disclaimer: Happy Backblaze Mac client and B2 customer, no other affiliation.
EDIT: @yev: I took the signal out after the sibling reply :) Appreciate the responses as always. Please stay awesome.