I'm keen to see how this pans out at the start of July when the API changes come into play. I'll most likely end up purging my accounts old comments and then deleting it, I'm not leaving anything behind that they can leverage.
If they really thought their userbase were a parasite on their resources, wait until I'm browsing their content without posting, engaging in comments or upvoting. Not really much you can do except migrate away and eventually reduce your interactions