I was also surprised by their decision. as far as I know Kraken only selects good quality and proven projects. but their decision this time is very contradictory, they are listing the shiba inu which is a coin meme with millions of speculations.
Actually Kraken is also not wrong by including Shiba Inu on their list even though it is only a token meme, what is clear is that it is a worthy thing for them to do and basically the Kraken will also benefit like listing other tokens in the past
The exchanges is not care about the use case of the coins or how the coins was made for, as long as the coins has decent trading volume, the exchanges would happily list it because it will make profits from big trading tax.
If one day the token / coins is no longer hype, they will just delisting the coin just simply as that, so we could not judge a coin is good or no for a long time hold just by which exchanges list the coin because the exchanges are just finding a coin with a potential big trading volume at that time.