I think the bonus is applied to transferring as well... if that's any comfort to you. I agree with your statement, the event is already quite boring (unless if you count the Machamp waller, and no, it's not Spiritomb) with Girantina being an utter letdown, and almost no new Pokemon being introduced.
Double Candy - Not exciting
So the Halloween bonus is only double candy caught on Pokemon?
I'm a little disappointed, I've been waiting for months to trade my legendaries (and Beldum too now), and I don't get any bonuses like last year?
Does it at least include hatching eggs?
I'm bummed out about this -_-
Not to mention the slow staggered release of get 4, give us like 30 at a time!
Answers
You mean they didn't have time to re-implement what they had featured last year? They had pleeeenty of time to plan for it, they just didn't want to give it to us. Otherwise you would stop trading for Km with people that use expensive incubators for distance egg from friends, and that's a source of income for them.
Well. Mathematically it is not reasonable what you are arguing:
You get a new legendary each week: 52 legendaries. + at least 50 legendaries from raiding gives a minimum of 100 legendaries per year.
You can only do one special trade per day:
unless 30% of the days of the year gives extra candies for trade you will always have more legendaries than you can trade