0.002 is so dam cheap to believe. Either it is fake or the keyword is rarely used.
was that like you were actually looking for an answer or being cute?
This entirely depends on whether the traffic CONVERTS into sales or not. I wouldn't buy any traffic without the intent of conversion.
It's good quality. (ROI is awesome)
I advise people to avoid this, nothing this cheap will convert well. Propel Ads aka the former Traffic Vance didn't have cheap conversions like this and each post from the op reeks of self promotion for a phishing scam.