Well, I am not sure about the current trend. But, You are right. Integrating 3rd party games is so easy. And Sometimes a few providers offer free Integration. As I have already said in my previous post, Every game has its different fanbase. 3rd party provider games also have a fanbase. But, I am sure that The fanbase of the In house games is bigger than 3rd party game fanbase.
You are right.
In-house games is what makes a casino stand out among its competitors. If all casinos are going to rely only on software providers and have the same games then why would soneone choose a specific casino over the others!