This was precisely my question to them. I said they need to go back to grammar basics and put "from a club member who owned the Ownership Interest" in some sort of call out (parenthesis, commas, etc) to differentiate it. My suspicion is they will just say a comma was missing and the sentence should say:
Purchasers who purchase an Ownership Interest at any
DVC Resort, other than Riviera Resort, from a Club Member who owned the Ownership Interest
, prior to January 19, 2019, are excluded from the prohibition set forth in this Paragraph 2.
That one comma changes the meaning of the sentence significantly. Then taking out the "from a Club Member who owned the Ownership Interest
," leads to a sentence that stands on its own and is very clear in its meaning. But their phrasing is still convoluted and could have been clearer.