Thanks for this.

Yeah, not meant as sneering -- just a note that some things are "redundant syntax".

Note that they may just appear that way because you don't get the joke or don't find it funny.

Sounds like sneering to me, but maybe I just don't find it funny.

For dummies: Using the same expression in different contexts, even in the same paragraph, is useful and acceptable.

'Haha' is a literary representation of laughter. It's an expression of the effect of laughter. The article you posted separates effect from cause, splitting the possible jokes in half. This makes things awkward, unsurprisingly. It's foolish and probably misinformed sneering.

Things can even get more complicated! You would be amazed: The more 'ha's, the more laughter. An easy example why this is not redundancy is in the difference between the half-hearted 'ha' and the more genuine 'haha' and the hyperloaded 'hahaha'.

Good luck out there!