It looks like I made a mistake regarding dust... I didn't find a valid transaction that proves that there are payments on posts/comments under $0.02, it looks like Dust still works!
My examples in the post were taken from the posts that were higher than 2 cents, but the reward "receiver" wasn't the only one who upvoted them... It's a bit confusing, but it would be even messy if we wouldn't have min. payout as there would be millions of micro-transactions...