Why are new vehicles few services too early?

I've bought a new 2 wheeler Honda Activa 3g (8'jan'20016). When I saw It's manual book I had come to know that they gave me 4 so called free services and 1st should be done with in 30 days or 7500-1000kms (whichever is earlier). So, problem is that i don't ride much and when I took my scooter to the service center It was only 161kms done on Odo-meter. They charged me 500 /- Rupees only for changing oil and wash I told them about few minor issues but they didn't resolve anything except changing oil and washing. I want to know, why are these new vehicles required early services.
Thanks. :)

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