It's a standard practice, my friend.
You're a fresh grad, they have to train you. Money is needed, and what if they train you on the job for three months and you leave? You will be wasting their time. They must make sure that you don't run off after getting trained.
Take it as a learning experience. Change jobs after a year when you're more familiar with the industry. $3k for a non-honors is good pay, but it's understandable as you have no AWS. Give and take lah.

And anyway, NO ONE will leave their first job in less than a year. It doesn't reflect well on your CV if you do.