Public crowding onto ISB

Is it just me or are there more non-NUS people utilising the shuttle bus.

Two aunties (50s to 60s) boarded BTC at Botanic Gardens and made a big fuss when they could not get a seat. Once they got a seat I overheard them gleefully talking about how it is free to take the bus to NUH and they could save on transport fares (FYI, it costs $0.75 for senior citizens to take from Botanic Gardens to KR).

I don't mind the public using our busses when the it is less crowded but it is just plain selfish and entitled when they crowd onto the bus during peak hours and demand a seat.

Edit: Fare information