They also didn't say anything about data caps, though there could be something in the contracts. I don't read Romanian myself and the PDFs of the contracts are time-consuming to manually reformat and feed into Google Translate. (Text selection goes across the page, not down each column, so it interleaves the columns.) But those minimum speeds—which BTW are guaranteed in the contracts—and no data caps would imply an oversubscription rate of only 4-5x.
One question to ask would be whether they are getting a subsidy to provide service at those rates. The subscriber might not be paying the full cost, or at least not up front.