Of course this would be a horrible rule to enforce between the "the contract changes weren't run by legal" and "that line is enforceable in this outher jurisdiction that we operate in". But scaring average consumers with a massive contract and a line at the end "even if part of this contract is unenforceable the remaining clauses apply" is just abuse of people who don't have the legal power to actually test if the claims are valid and get screwed over.