Question about the Bonus for sending out mystery gifts during worlds

so it states in the page for the worlds store

If there is a Pentakill or Baron steal during Worlds, the chances of landing a legendary or eSports-inspired skin will double when you send a Mystery Gift. If there are two or more trigger events during the same stage (see below) we’ll up the chances even further. At the end of each stage, the bonus will reset and start over. Who said Big Plays couldn’t get any bigger?

Stage 1: Group Stage 1 [October 1-4]
Stage 2: Group Stage 2 [October 8-11]
Stage 3: Quarterfinals [October 15-18]
Stage 4: Semifinals and Finals [October 24, 25, 31]
Bonus:  If you send a Mystery Gift during every stage (4 total), you’ll get the 2015 Championship Ward totally free.

So for the bonus you have to give out a mystery gift with each stage but does that mean only when the games are playing and it ends with the last game?

Reason is there was a baron steal and a penta and the triple bonus is still available so does that mean that so long as i give out a gift before stage two starts and also for stage 2 does it mean so long as i give the gift before stage 3 starts that i will still be eligible?

There is no real clarification on this and i havent really seen any comments about this very topic, i did send out a mystery gift last night but am not sure if it will count and i also know of some friends who dont get paid till between stages one and two so it would also be nice if they could still get it or if they should not bother about it as they wont be able to get the free ward skin anyway.