before I answer the two questions you asked first I want to comment on this:
It is the first time I have seen this site, and I have not seen this news on the sites I am used to seeing, this is very strange. What makes me wonder if this is not just a rumor
Do you think this deal will be positive for the crypto?
if this news is true news, then I believe it will be something good for the cryptocurrency market
Don't you think 400 Million is too much for the CMC?
honestly I think it's an exaggeration, I wonder how the coinmarketcap price was estimated?
Its a big amount for a single website that is just pulling data from exchanges but it drives traffic because most of the crypto users are just using the website for reference. Binance is often doing their best ideas to conquer it all. That big amount may not matter anymore to them for they all getting the money easy from the market they also manipulate.