Could be higher now, the market is down and investors are not looking for new coins so those developers they are just gone after getting funded we have so many projects recently that scammed so many investors like Adab IronX, if the project is scam so are the bounties, you will either not going to get it or if you got it it will have no value in the market.
I was also going to post this 90% is less now they are nearly 98% or 99% as most of projects are not good and attractive and investors also have nothing serious in them most of them are just waste of time nothing else I also have many thousands coins with no worth and they will never been in good in future.