You definitely want to avoid Fortune Jack.
They promised one thing, then changed the goal posts simply because they felt like, stealing a huge chunk of my future earnings on players I sent them while the previous deal was in effect.
This sort of bait and switch, where unfair retroactive changes are forced onto affiliates, is very much frowned upon in our industry.
They are either having money problems, and player funds will soon be in jeopardy, or they did it out of pure greed. Take your pick -- neither is a good situation.
If you currently promote them, it's best to update the page to a rogue listing. Don't just delete them -- share why they are now considered a rogue brand. Players appreciate this and will find your site more reputable if you show them why they should steer clear of certain brands.