What Atkins plan are you following? All those foods are allowed, we are mentioning some items that cause stalls in some people.
With pork rinds it's not the carbs, but the tendency for people to overeat them. An ounce is a tiny packet, but some grab them by the handfuls out of a big bag. I have found no problem with artificial sweeteners in calorie free sodas, but a problem if mixed with calories like the Atkins shake or keto baked treats. But if you have only had 3 and are not driven to overeat the next meal, probably Ok for you.