So they are taxed on curation.
Had this discussion with eonwarped who I believe had input on the new rewarding system and he agreed by the end lower based HP levels lose out.
While 50% of the reward now goes to curators giving a greater reward% from a post to curators. Reward levels are based on the HP Taxing low level users.

Example. Prior to the change from the linear curve. I had a vote of 0.02c With a purchase of €400 I doubled my stake. The change to the reward happened and I was back to providing a 0.02c reward. The value of the token at the time was still the same, there was no value drop.

Maybe a post is not the best place to go to a discussion.