There is no ICO in Decred.
ICO is scam, people pay a pre-set amount off the market for a promise written on a piece of paper that has not even begun to be developed and which usually will never be.

The funny thing is that these same people often criticize a premine, where devs need to work to make the market value the coins that will serve as their payment.
All the similar projects you saw are copies of Decred.

Decred is a project that finances itself through its own mined coins.

With each block 60% of the coins are destined to the POW miners, 30% to the POS miners confirming the POW mining, avoiding that a concentration of hashrate can determine the path of the coin and 10% are destined to the development fund.
At the beggining, a premine was made to finance the currency until the 10% of mining reached a reasonable amount for that.

Contrary to what the fudders say, the premine doesn't go all for the main devs.
8% of the total coins were premined, of these 8%, half were distributed to thousands of people around the world through airdrop.
Of the remaining 4%, about 1% went to the initial development fund, paying for marketing, design and also other devs. Still leaving an amount that continues in this fund.

Only around 3% were allocated to main devs as payment for all the work done since 2013, including the development of BITCOIN SUITE, which today is responsible for enabling ATOMIC SWAPS and is a fundamental basis for the development of LIGHTNING NETWORK.
Work recognized and consecrated by other currencies devs and also by LN developers. 3% divided by more than 10 people.


Ethereum was coded using the bitcoin suite developed by Decred devs.