But on the other hand, I think it's one of the worst and least effective ways to spend bitcoins. I can find hundreds or even thousands better ways how to use my btc instead of giving it to politician.
It's not useful for traders of bitcoin, but it's somehow positive for bitcoin anyway. It's getting more wider and wider with this agreements and news happening on the world.
Donators can buy bitcoin for this reason in near future.
Yes i think you were right. It is also some kind of advertising bitcoin, although traders or holders wont benefit that news. Well anyway, it is good to hear that, a candidate is using it for a campaign, or maybe it is also part of his advocacy and can spread out the good benefits of bitcoin.