[kira272921]

> I was going to ask how to pay the gas/fees, but IIUC this only runs in the testnets. Are they 100% free?

Yep! This entire process is entirely free.

> Does the code connect in the repo connects directly to the testnet or it connect with your server and your server connects to the testnet?

The process of minting an NFT takes place via the backend.

> If someone modifies 1 line of code (and add some oney for the fees) it goes to the mainnet?

We have a specific contracts on testnets (Polygon Mumbai and Rinkeby for now) and we use those contract addresses to mint the NFT. No one can change the network on which contracts are deployed, so the NFTs would be minted on testnet itself.

> Do you sell an "upgraded" version/service that connect to the mainnet?

We don't have any kind of "pro" version which mints NFT on mainnet.

[gus_massa]

I tried the form in your page. Can you add a random image? Something like a gravatar that has some abstract pattern with a few colors. [I'm not sure about the license of gravatar. Take a look before using it or an alternative.]

> We don't have any kind of "pro" version which mints NFT on mainnet.

What are you selling? Is this only a hobby? [I'm not against any of the options. I'm just trying to understand what you are doing.]

[kira272921]

Hey there! Thanks for your suggestion! We will make sure we can incorporate this. About your question, NFTank is a developer tool, which means we are helping developers test NFT based applications. Generating NFTs even in testnets is a tedious task for devs so we are making it easier, this tool is for devs, not something to be used in production environments. Thanks for your question! I hope you have a wonderful day ahead!