When we visited, they said that the enrollment deposit was not refundable, but part of the housing deposit was refundable if you decide not to attend. Someone asked about scholarship situations, and they said that deposits for housing would be credited back later if the student had a scholarship. For students who have to pay, the deposit is credited against the housing bill. Hope this helps.
Not depositing only means that you would not get first crack at picking what room you get, not getting shut out of rooms. So you may not get the exact dorm building or room type you want if you don’t put a deposit down, but you would likely not get shut out of housing, especially now that there is more housing on campus.