I try to follow the Chicago Manual of Style, so for me it’s Travis’s. Generally that’s the style guide used in fiction.
The Associated Press Stylebook just puts an apostrophe at the end of a proper noun ending with “s,” however (although they will use an apostrophe-ess for common nouns, creating things like scissors’s).
It wasn’t always followed on Reddit, but downvoting there was supposed to be for comments that don’t contribute to the conversation.
Here the guidance is looser – the docs don’t address comments, but do say to “upvote posts that you like.”
I’ve tried contributing to some conversations and sometimes present a different viewpoint in the interest of thought exchange, but this often results in massive downvotes because people disagree. I’m not going to waste my energy contributing to a community that ends up burying my posts because we have different opinions.
That’s true on Reddit to, so I’m kind of being tangential to the original question. I guess what I’m saying is that some people might feel like I do and won’t engage in any community, be it Reddit or Lemmy, if it’s just going to be an echo chamber.