Something I'd like to make clear about the "Rosé mistreatment" thing. (You can see this more as insider info rather than "tea").
From what I have seen, Blinks got angry cuz Rosé has not done any CFs this year.
Majority of times, a company will ask "Can X endorse my product?" meaning they have contracts written for the specific idol THEY want to be the face of their product.
It does happen that a company says "YG, please give me a member to endorse my product", but this is like 0.5% of the times.
From what I've seen, Rosé is the least popular member in Korea (there isn't a lot of talk around her). Jisoo is known for her beauty, Lisa for being exotic and her skills, Jennie as the princess and also for her skills. That's life in the industry. Every group has a member that doesn't endorse products or does a cf rarely.
Besides, Rosé is working on her solo, which got outed this morning (is already out in the news)