Are we really arguing over 1 week of boosted zeppelin missions for a few sigils?
9 v 10 weeks, who cares. It works out to a difference of 45 sigils for the 100% bonus, I say deal with it.
If you don’t like it, then don’t get it.
You spent sigils on 100% token bonus for your zeppelin missions. Did you ever get less than 100% since you claimed it? No? Then this is done. You didn’t exchange your sigils for a 100% bonus over the rest of the player base. You exchanged your sigils for a 100% token bonus over what the base value is.
PG just decided to be nice and throw people a bone during breeding events.