I will disagree with you based on the % you indicated,  yes majority of the project are not worth it but that doesn't mean that only 10% is real. Come to think of it, if only 10% projects are meaningful I believe majority would not still be into cryptocurrency. There are very good legit project out there about 40% have been able to actualize it and put their project out and also listed while the remaining 10% is still struggling to meet up mostly cos of funds