well there is a context to this of people doing ridiculous projects just because they can through LLMs, of which Claude excels at for code-writing, so it makes sense that two users would have a similar reaction to this. also copying jokes from other people is as old as time (just check youtube comments from 2008)
I don't think it's obvious. A likelier explanation is just that a lot of people are using Claude (especially HN types). Do you have any actual evidence?
You can explain away any obvious astroturfing campaign with "wow, so many people love this product and feel the need to bring it up all the time in unrelated contexts!" if you want to.
If you think two people making the exact same comment about "Claude Max" (not even just Claude, specifically bringing up the $200 subscription) on an unrelated post is organic, I don't know what to tell you.