obviously all schools are different and every case varies, but i have a little success story about this:
this past year i rushed (fairly competitive, but small school) with a bunch of my suitemates, ones of which had pretty moderate/severe acne. She was always so self conscious about it like late at night, when we were washing up for bed, but you would never be able to tell any other time because she was so sweet/funny and pretty much perfect lol. Anyway, skip to pref: she had 2 of the most desired sororities on campus (i KNOW this is frowned upon, but she ended up in the TOP sorority). No doubt it was because she was beautiful inside & out despite her acne.
You can guess what im trying to say
. Good luck with your rush and if any treatments don't work, really don't worry about it!