We should. By buying their product. More importantly, we should also recognize those who do use predatory tactics by not buying their product. Being a fanboy/hater does nothing directly to affect a company; as I said, some of the best sold games last years had A LOT of bad reviews and outrage aimed at them. In the end, what really matters is their profit. I want PI to succeed, but I don't sugar coat what they do, because they need to get better. They're not perfect, they need constructive criticism in the form of financial growth, not fanboyism.
For example, I brought several new players to PI games and it was a pain to convince them to expend over 4 times what a AAA game costs in my country. That's because PI has a horrible DLC model that inflates their pricing. Some bought bundles, other stuck to the base game. So, if you ask me, PI has a DLC strategy that's unfriendly with new players. It doesn't matter to me, I have it all for all the in house products. But for a new guy wanting to start playing the older stuff like EUIV and CKII, it's really hard, specially in developing nations. And here lies a problem: A model that never changes is unsustainable. Clausewitz is getting old and it shows. Soon, the novelty, or the 'good guy' shtick will not be enough. They will need to inovate and that's expensive. They need market share and that only comes with new players. I've been here for close to ten year now and probably will be for many more years, but I'm not enough. They need someone to tell them, with their wallets, "this is good and this is bad, keep up with the good stuff". And to provide healthy feedback we need to be rational. As I said before, the removal of wormholes and warp really turned me off from Stellaris; I bought all DLC except for Megacorp, hoping I could get used to it, but I didn't. I still play it on 1.9, but it's not the same. And more importantly, I'm not a customer anymore. However, I believe it was a smart move: it brought the game more in line with the industry meta for space strategy sims, made it more friendly to newbies and casuals and probably made more people play the game. So they lost some customers, but got more out of it. Too bad for me, but in the end, I'm happy for it; it brings us closer to better games in the future. Anything that brings the world closer to a Vicky 3 is fine in my book.
Anyways, in my opinion, the closer we get to a dev, the more personal our relationship becomes and it becomes harder to recognize mistakes and wrong doings, as well as good behavior. That's why many of the haters out there started as fanboys. If we keep our distance and our comitment to a minimum, it's easier to react rationally when they do stuff we're not confortable with.