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I think I agree with you:
- OP provides no examples of the claimed sassy comments, not a single one. It looks sufficiently generic to be early-AI-produced (recent AI should be able to go extremely specific lol).
- Account claims to be male but the username comes off as female: sarah2653@lemmy.ml
- The account is primarily comprised of open-ended posts with nearly zero comments, so it doesn’t seem to be primarily concerned with actually thanking anyone for any of their input or sharing any further context beyond each post, or at least sharing what they took away from any replies.
Conclusion: this post isn’t worth responding to or wasting any further brainpower on because the scenario is fake. Downvote it to hell and maybe even report it until OP gives evidence otherwise.
Based on everything else you said, I’m unsure about this.