I applied and was accepted last year and was only given 5 days to decide, and they also told me to only accept if I “firmly believed” I would attend. Just ignore that little passive aggressive piece of the email lol. Just accept and use it as a placeholder in case you don’t get accepted to somewhere else you’d rather attend, and if you do get in somewhere you like better you can just rescind your acceptance to USF. That’s what I did for multiple programs including USF and there was no issue or repercussion. Congrats on your acceptance!