It's a fun example in how easy it is to setup, and I don't want to poke too hard on a hypotheticals, but I don't like two things: 1) Egress is hand-waved, when

It's a fun example in how easy it is to setup, and I don't want to poke too hard on a hypotheticals, but I don't like two things: 1) Egress is hand-waved, when in reality the free GBs would basically exhaust in a month on just pongs and reconnection requests, so doing nothing at all. That amount of people just sending single emojis as messages for just one day (to play along "short marketing event") is already matching monthly napkin estimate stated. 2) Isn't there's a good chance Memorystore wouldn't be able to handle this at fairly charitable load interpretations under that many CCUs? 1‰ of those 250k CCUs sending a message every second means Redis needs to publish 250k messages as well. Again though, I'm aware it's only a hypothetical scenario demonstration, and it really does look cute in how it's simple to deploy. Fun stuff.