Not many people decide to do this procedure.
Because 99% of projects starts with collecting funds with ICO/IEO. They present their dream, realise ETH placeholders and starts to work on product (if it's not pure scam). After developing product they move to mainnet. IDENA started with product.
This is how you gain followers and create a community you start with platform and product if the developer find a way to fund the project even privately then it's good people wants to see usage and platform, just like they what Mrai now Nano did.