I haven't received a push assignment in a very long time. Of course, I never received them frequently; I've only received two in all the time that I've been on EF.
When Justin was still on staff, I contacted him once looking for an assignment for a student. I had written "push assignment" in my e-mail, even though that's not exactly what I was asking about. He replied then that they weren't doing push assignments at that time, but that we could still find my student an assignment.