Heck yeah. Glad to see they are getting lots of sales. I know a lot of my friends are looking forward to this game, pretty much anyone who has grown up on some of the older RPGs are definitely in the boat for it.
Since the price isn't hugely discounted I imagine a lot of it is word of mouth and things. Most people don't buy a lot of games if they aren't significantly discounted. There is sometimes pre-launch increase of sales. But even to get so high on a Summer Sale is amazing. :o
Good luck Larian and hope you can keep on giving us great games in the future. <3