Don't fall for this. Just pretend as if you never saw the number $49,900.Even if Tesla raises the Dual Motor $49,900 reveal price by 40% it will still be under $70k ($69,860).
There will never be a $49k CT just like there has never been a $35k Model 3. Musk does this all the time. He throws a number out there and 5 years later when it's time to finally deliver, that is still the only price that is being talked about.