Clarity on Eligibility of Challenger Rewards
"If an account is eligible for the usual End of Season rewards, it’s probably also eligible for Challenger rewards if it also meets the standings criteria outlined above. That said, Challenger accounts will be subject to additional screening for account sharing, win trading, toxicity, and other negative behavior. These violations render offending accounts ineligible for both Challenger and End of Season rewards."
As you can see, Riot has stated that accounts will be investigated for toxicity and negative behavior, but to what extent? If a person were to be toxic at the beginning of the season but however has shown great improvement, will they still be ineligible for these rewards? That's what I am really curious about since it is kind of vague.