The massive difference is that Kite is using manipulative, dishonest tactics.
When I sign up for a service like Code Climate it's very clear that I am giving them access to some of my code. I also have easy control over what code they can see. They are honest and upfront about what they are doing and why.
Kite has been trying to hide what they are doing, with the goal of tricking developers into doing things they otherwise wouldn't. They're taking advantage of the huge amount of trust in the open source community. Kite must know that abusing this trust has a high chance of hurting the community, but they don't seem to care, as long as they can make a quick buck or two for themselves.
A lot of people here really cherish that trust and goodwill among strangers in the open source world, and are understandably pretty pissed when someone comes along and messes with it.
The bottom line though is being honest and upfront with developers. I suspect Kite could have been a bit more forward about what they were doing and the developer community would have reacted with much less outrage.