At the entrances of 50 coins, there are no awards for two days already.
This is normal? Or is this setup no longer relevant?
Now the actual minimum of 100 coins to receive a reward every day.
50 is already considered that very little

Why 100? Now it seems like enough 80 coins at the entrance, that would receive a once-a-day reward. Or am I wrong? Correct me then.
Yes, you are right, more recently, there were enough 80 coins, but with each block the complexity of coin mining increases, so now it is absolutely imperative to have at least 100 coins at the entrances