> Edit: I've also noticed on HN that sometimes I will get downvoted really hard for no clear reason and then two weeks later HN will magically transform my down

> Edit: I've also noticed on HN that sometimes I will get downvoted really hard for no clear reason and then two weeks later HN will magically transform my downvotes into upvotes. Not really sure why that happens, maybe a wave of bot banning? Yup, I've seen this more recently but now the cycle is faster. My comments regularly get downvotes but then later in the evening they turned into upvotes. Also back in Dec 2017, there was a huge wave of people shilling on reddit for ICOs and subreddits would regularly post what "HN users think" and "how to correct them".