Not really sure where the demand is for these cards? It's clearly "benchmark" better then the 1660 and just within hand holding distance of the 1660ti. I'm guessing there is a cheaper manufacturing cost associated with the cards otherwise why take away sales from two cards that launched about six months ago?
Well, it's only $10 more than the 1660, and without OC, it performs nearly identical to the 1660 Ti. However, checking the OC results, you will get the difference: 1660 OCs by ~14-15%, the 1660Ti by ~10-13% and the 1660 Super by only ~6%. So you get the 1660S base performance by OCing the 1660, but you can get ~6% better performance for $10 more, which is actually good. However, the price gap is too big for the 1660Ti to buy, where you get ~7-8% extra performance compared to the Super by OCing it - for an extra $50. Compared to the 1660, the Ti was an option for ~15% extra performance for an extra $60, but not an option any more for an extra 7-8% extra performance against the Super for the extra $50.