1) I am assuming UCSD is an implicit rejection for those who haven't received anything because they have sent admits and waitlist.
2) USC has sent first round of offers to candidates this week, but they haven't sent waitlist or rejects to anyone so there might be some hope there.
3) Toronto hasn't sent any international anything so far besides checking whether some have any dominating offers
4) For UBC, someone (international) received an exploratory offer yesterday after the school had sent first round of offers maybe two weeks ago.