The difference between Shadowspawn, and not Shadowspawn, to the three oaths. It also isn't clear on the show if Amalisa took those oaths since her ability is greatly increased. The show also showed that as soon as the oaths allowed the one power to be used they had no difficulty in defending themselves from army of Logaine.
And yes every show, with massive viewership, is a success for the season that got those views. Even shows with out great viewership that get a season 2 were successful for at least 1. Because shows that are not don't get renewed and the entire industry doesn't work if only massive hits are pursued. Because there would be a lot of dead air. There is a reason why b-tier (or even lower) exists for movies. TV shows are similar. Look how Soap Operas dominated day time television for decades.
- - - Updated - - -
$50 million is way to generous. Red Eagle last paid $465,000 for the rights. Originally it was $35,000. I doubt Amazon would pay $50 million for the rights given what was had and the failures to bring something to screen over the years. Red Eagle is still involved, though apparently not in the decision making capacity, so it again seems like the price wasn't that high. Sony is also involved to some degree as well.
https://dragonmount.com/news/tv-show...-rights-r1154/