Maybe 10% of icos are launched their products and still doing well in crypto market like eth, nxt, ioat, neo, lisk and some more but 90% icos filled to launch their products due to scam companies and stolen investors funds and now those coins no value in crypto market and be come shitcoins now.
i may not agree for 10% as i see in the market there is only 5% or lower make thier promise product , more of them is just want money from ICO and no real plan for the next development. Mostly all success that havebthier own product is exchange.
I do agree, 10% is too high, 5% or lower is enough estimation.
And that is how business works. They are after for instant money and not for the long term project. They actually have their plan but they just don't want to continue and just enjoy the fortune that they have collected.