I went to OpenSea, and one question kept coming to my mind:

how do people justify spending so much gas to mint 10k NFTs?

That curiosity pushed me to start opening real collections and reading their contracts instead of just assuming things.

While doing that, I noticed the token standard written there: ERC-721. It was a small moment of recognition, I already knew this standard. That small joy hit me for no clear reason, but it did.

Then I opened another collection and saw ERC-721A. That’s where things started making sense. I went and looked into the proposal, and suddenly it clicked this is how 10k items can be minted while saving a ton of gas. That answered my original question about why large collections often choose 721A.

As I kept exploring, I came across a collection with around 50k items minted.

I was 100% sure it had to be ERC-721A.

But I was wrong it was plain ERC-721.

That surprised me a lot. Honestly, it hurt my brain for a moment. Why would someone choose ERC-721 and pay that much gas for almost 50k mints? That confusion pushed me to dig deeper, and that’s where I stumbled onto a completely new concept.

That collection turned out to be The Warplets.

Through it, I learned about Farcaster, which is basically a decentralized Twitter. Each Farcaster account has a unique Farcaster ID, and each ID can mint only one NFT.

That single constraint changes everything.

Each NFT is personalized it uses your Farcaster ID as a seed to generate traits and even pulls in your profile picture to add nuance. It’s almost like asking, how would my personality look as a Warplet? Naturally, that creates curiosity and buzz. People want to see their version, and the mint goes crazy. From a design and business perspective, it’s a really smart idea.

And then came the cherry on top.

While reading the contract, I noticed it importing IERC20, That was unexpected and made me pause.

That’s when I learned about the dual-token mechanism.

For each NFT mint, a certain amount of ERC-20 tokens are burned. The project allocates ERC-20 tokens to the NFT contract, and every mint reduces the ERC-20 supply. As supply goes down, price pressure builds up. Holding the ERC-20 early feels valuable, minting still happens, and value flows either way. It fits the dual-token model perfectly.

One more important realization hit me here.

Not every NFT collection is built using ERC-721A, even if it’s gas-efficient. 721A comes with more complex logic, and more complexity in smart contracts can lead to bugs or vulnerabilities if not handled carefully. For some projects, it actually makes more sense to pay a large amount of gas upfront using ERC-721 than to risk security issues or unexpected behavior later.

Seeing how all these pieces fit together the ERC-721 choice, Farcaster identity, personalized traits, and ERC-20 burn mechanics was honestly fascinating.

This wasn’t about gas optimization anymore.

It was about design constraints, trade-offs, and intent.

The idea behind this NFT project is really nice and genuinely fantastic.