Ignore drop code.
Sometimes, even 2-4 code still can be banned as well. Never claim it anymore.
For daily drop code I never wait for it but when I was playing then a notification appeared from Telegram so why should ignore it

Until now I don't know the answer or the reason so we can't say what the cause is yeah just guessing.
That's a common thing happening to players these days. I saw that pretty often on reddit
Many casinos do this, almost all the casinos on this forum but each case has its own reasons
For example, your account has been restricted/limited on sports betting and we know the reason well, for cases like this I think it's still reasonable
but yeah in some cases there is a possibility of wrong accusations.
Looks like Stake is trying to create a fair situation for other users to claim the code. Many people were complaining that the bonus code reaches the max claim limit within a blink. Maybe that's the reason for applying such limitations while you claimed 4-6 bonus codes only. I have stopped following the bonus codes a long time ago after getting the 'bonus code unavailable (max claim reached)
At first I thought so but that's not a fair way right? there must be a fairer way for everyone, not for some people.
I'm just like you never prepared wager for code especially since the code is claimed in seconds but this time the situation is different my betting activity is profit so I have some tickets and when there is free money I will try to take it.