To add context, is a type of captatio benevolentia (“obtaining benevolence/captivating”) and as such is typically placed at the start of a discussion.
Someone uses cleuasms (I’m gonna create a word by inferring a translation) many times in a discussion. Pay attention: this unsolicited and reiterated form of humbleness can be too much. If you shouldn’t have right for a statement, apply suspension instead ;)
Weird, I was actually writing a response wondering whether there was a term for this phenomenon and then got distracted by work. I made a post about a week ago that I thought would be fairly unpopular and it ended up being my most upvoted post yet. It's like a super specific form of self doubt.
"I'm going to get downvoted, but..." - proceeds to get upvoted
"Unpopular opinion: " - is actually a popular opinion