This is very much true, never ever underestimate the power of customer satisfaction, if you have a good relation and offer a good product at a fair price + deliver a good service(return policy, product transparency, fixing problems with products etc.), you get satisfied customers who will recommend you and your products because they got a good experience with their purchase, it is the cheapest and in many cases the best advertise you can get… Mouth to mouth recommendation between people will lead to a good reputation, which usually will lead to more customers and sales 
This however may not be the best way to maximize profit right here and now, but it is often a good foundation for future products 
This I am a bit split on because should it matter that I have played the game since beginning of early access, still play and have +7000 hours in the game?
No not really, I don’t care for special treatment, all I want is to see progress and keep having a good time playing the game, especially when new updates and new content is available, which leads me to your second example… 
I do however believe that “veterans” or just simply old/long-time players who play the game game regularly between updates are a huge help for them because they are sort of those who keep the lights on between updates so that the game doesn’t seem dead at these times, they add a lot of value to the game, but still I don’t think they should have extra/better treatment than others, maybe some form of recognition which could be a thank you or a coupon with a discount on their next purchase, but other than that, no I don’t think there should be special treatment for them 
This is how business work in a lot of areas, when a specific product sales stagnate, it is either not “new” and special anymore, so they reduce the price of the product, put them on a sale or sell them in a bundle at a lower price, this I am fine with, I also bought the game and all Dlc’s at full price, simply because I was an early adopter and really wanted to play with it… I got something at a time when it was brand new, so I was happy with my purchase 
I have no idea what the future will bring, but like you I fear that we have only seen the beginning of their new strategies to maximize profits, it is no longer a question of delivering a good product at a fair price and leaving customers happy, but it is to create a need and exploit it to the point where they no longer will accept it.
I don’t think Funcom can ever take control since Tencent now own the majority of the company shares, and therefore in the end has the final say, if a company want to stay in full control, they need to either own at least 51% of their shares or make sure that no other companies have a majority.
I do however share and understand your frustrations and I believe there are many of us, time will tell if they succeed with these new predatory tactics.
The future of Conan Exiles depend on a lot of things like…
- Can it bring enough profit for them to continue the development of new things for the game?
- Can they keep or grow the playerbase, so that the potential customers for content expand?
- Have they released a new cash cow(Dune?) and no longer need to keep CE alive?