GMAT Sentence Correction (SC) | Re: #Top150 SC: Until 2010, a state tax regulation known as the 80-20 rule

I don't buy "like" as introducing a comparison here. Remember that "like" only compares stated nouns, so it would have to be comparing ground-floor rent to "other sources." We can't compare them to the method of collection, since that noun doesn't appear. (In any case, those wouldn't really be parallel.)

So we're left using "like" to introduce an example. While "such as" is preferred, the GMAT has used "like" on occasion. We can't always
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