IEO is definitely much more profitable and convenient for investors - this is an evolution of traditional crowdsales and the hype moved to IEOs in 2019 - that's obvious.
The IEO has not taken an important role in increasing the new projects that enter the market. Successful project growth in the IEO is still small. it takes more projects that are successful with the IEO to increase trade in the market. because most of them come with very fresh money from new investors.