It looks like the 49ers probably won't be getting any compensation for Anquan Boldin.
NFL free agency began two months ago, and it hits a big day this coming Thursday, May 12. That day is the date in which free agent signings will no longer count in the comp pick formula. That date used to be June 1, but the NFL bumped it up to May 12 last year. One reason it was bumped back was so that veterans could sign and still get in for May OTAs. Previously, players left to wait until June 1 got in for mandatory minicamp, and not much else.