Auto-Liker Working at 2-3 second delays: Weird

So I went ahead and bought 24 hours at instamacro which I have already known about and used to use before I started using my own bots. Instamacro is basically a website that does what bots like instaget and instaflow do.
Basically I watched it liking pics from another profile and it was like a new pic every 2-3 seconds for the whole 24 hours with no ban.
What are they doing differently or how are they running their bot?
People are having trouble running instaget and other bots at over 15 second delays so I found this very weird.
I know auto likes can be done at faster speeds now after seeing this.
What do you guys think?

I know what your next thread will be, "Help my instagram just got banned"

Let me add to this that the account I used it on was just made. It wasn't even an hour old. And I had the auto follow feature on. It ran the full 24 hours. I ran instaget on a brand new account and it got banned within 4 hours.

They must be actively patching instaget, or they dismantled instgets proses/method.