I have some question about submitting files

1) I would like to know the reasons for the problems that cause many accounts to be blocked or closed to work with PNG in Adobe stock, so that I don't have to face such problems in the future. Also, if you are careful and follow what things to work with PNG, you can do a lot better. Please let me know.

2) How many pixels is meant by 4MP in Adobe stock? Or, What is meant by 4MP in Adobe stock?

3) I've already read the Adobe Stock guidelines, which state that submitting more than 3 images of the same type is unnecessary. But according to my research I found that many contributors have submitted 20-40 similar images and they have been improved. So will their account be damaged or the account may be closed? Submitting more than one image of the same type can result in account spam or account closure? If only three are submitted in an image count, there are a lot of different niches to look for. If you give the maximum number of images of the same type, there will be no problem in the account in the future. Please let me know.

4) In Adobe Stock, 51 files can be submitted in the first state, 501 files in the second state. Again if 1000+ downloads then 3000 files can be submitted, please let me know how many files can be submitted if this is the number of submissions and downloads.

5) As I want to work with png, please let me know why previous png sellers got their accounts blocked and closed. What if I am careful, I can get good downloads and succeed in Adobe stock.