I don’t know this specific company but those vendors aren’t usually a scam, per se. They represent a legitimate electric company who will legitimately provide electric to you if you sign up.

They also often use deceptive and high pressure sales tactics like you described. I personally doubt that they could ever be the most optimal choice for who you buy electricity from, because door to door sales people are very expensive and the cost of those sales people is baked into the cost of electricity, if you bought from them.

I always just cut them off and say “no thanks”, or better yet, don’t randomly answer the door.