Yeah I initially thought it was only for students who were undecided about the offer as well but surprisingly I've met people who already accepted and attended just to ask more questions about the course

And yup, I believe most of the students have/are waiting for offers from another school, so its difficult to gauge how the accpetance rate would be like.
And yup! the 6 month work attachment is one of the main reasons why I decided to take up the course. Its especially advantageous for Accountancy students as UniSIM has partnerships with reputable companies for their work attachments. The compulsory overseas experience was another reason for my decision as this will probably be my last phase of education I would prefer to have a hollistic university experience, and I believe UniSIM will be able to provide me with that.
Hopefully your niece and your son will get the offer in the second window! Fingers crossed for them!