Fill in the coin once. It goes live on pump.fun with an EchoPad collector as its creator, and every lamport of creator fees it earns comes back as another copy in the new-coins feed, pointing here.
Square works best. 4 MB max. Skip it and the coin gets the EchoPad mark.
On pump.fun, your coin and every echo link to your coin's EchoPad page, and the description ends with "Launched on echopad.wtf". Your own website shows as a link on that page.
Prepaid at 0.0058 SOL each and fired right after your launch confirms, one every 4 seconds, before a single fee comes in. 0 to 100.
Rides in the same transaction as the create, so nobody buys before you. Echoes never get a dev buy.