No, that's completely wrong.
That number is specifically for their SmartCast subscriber service. It's not clear what the rate is, but they subsequently talk about Roku making $40/mo; so it's possible that's the monthly rate. Assuming it is monthly, a television lasts for five years, and that is their only other source of revenue from the televisions, that's ~$1200.
The telling part of the article:
> ...[Vizio's] Platform Plus segment that includes advertising and viewer data had a gross profit of $57.3 million. That’s more than twice the amount of profit it made selling devices like TVs, which was $25.6 million, despite those device sales pulling in considerably more revenue.
