I'm not the parent but he's probably referring to the opinion of some that SD is the equivalent of a spammer and its transactions should be blocked. You can find lots of threads on bitcointalk.org discussing it: https://bitcointalk.org/index.php?topic=150405.0
SD notifies losers by sending them a very small transaction. Because of this SD generates the majority of BTC transactions and inflates the size of the generated blocks.
There were a few more discussions around this time too, a few people including a pool operator want to block all businesses and applications that "abuse" the blockchain. This shows that a few higher ups in the Bitcoin community are short-sighted and very selfish, and also shows the problems Bitcoin will have at getting any larger.
I read a few pages of the forum posts about SD's transaction "spam". Could you clarify the notion in the thread that SD is generating more money for themselves by using these micro-transactions rather than internalized accounting?
I gathered most of that. My confusion was that people on the bitcoin forum were implying that performing loads of 1 Satoshi transactions was financially beneficial for SD somehow, as well as to miners.
I can't think of any way SatoshiDice benefits from the spam it creates. It's almost like a form of trolling. If this spam benefits no one a rule change shouldn't be a big deal.