He doesn't blink at the truce. He knows Natasha is ruthless; he also knows a promise ensured by a threat is safer.

HYDRA does get a blink. "Back in '96 -- no, '97. Ran into a group using the HYDRA name, out in Slovakia. It went deeper than just a recruitment strategy, they had ideological connections, but the trail went cold after we cleared them out. Might not be connected to what you're looking at, but the agent in charge was a Stefan ... Pekar, I think."