I billed more in one weekend of AI image generation than I earned from my first three months of stock sales. That was the moment I sat down and actually read the pricing page instead of skimming it. The fix cost me nothing but an hour of reading, and it cut my per-product image spend to a fraction of what it was across the 39 products I eventually shipped.
Here is what I learned, in the order I learned it.
The pricing page is a spec sheet, not marketing
I used to treat the pricing page like a checkout form I had to pass through. Wrong frame. It is a technical spec for your pipeline, and it answers questions your code needs to know:
- Is billing per image, per credit, or per batch?
- Does a higher resolution cost more, or is it free?
- Do failed generations get refunded, or do you pay for the reject?
- Is there a free tier, and what are its real limits?
Every one of those answers changes how you write your generation loop. I had a loop that fired one prompt, checked the result, and regenerated on failure. On a platform that charges for failed generations, that loop is a money shredder. On a platform that refunds failures, the same loop is fine. I was running the shredder version for weeks without noticing.
Resolution tiers are where the money hides
This one hurt the most. I was generating everything at the maximum resolution because I assumed stock sites wanted it. Then I read the review requirements properly instead of guessing.
Adobe Stock wants a minimum of 4 MP for vectors and images, but there is no prize for 20 MP when the reviewer checks the same things: title, keywords, no artifacts, no trademarked content. Vecteezy and Dreamstime have their own checks, and none of them reward padding pixels. What does reward padding pixels is the pricing page, which charges you for them.
The fix was boring: generate at the smallest tier that clears the platform's minimum, then upscale only if a specific product needs it. My preview-and-inspect step went from rendering at 300 dpi to inspecting at 60 dpi, which also mattered because my whole pipeline ran on 1 vCPU and 2 GB RAM. Lower resolution meant less memory per image, which meant I could keep the one-process-at-a-time habit without the box falling over.
Batch pricing changes your loop shape
Some engines give you a better effective rate when you request variations in a batch instead of one at a time. If that is true on your platform, the correct loop is: write one strong prompt, request the batch, pick the best, discard the rest. My old loop did the opposite, iterating the prompt one image at a time, paying the single-shot rate every time.
I rewrote the generation step around batch requests and my acceptance rate went up, because picking the best of four beats hoping the next single roll is better. Fewer total generations for the same number of keepers. That is the entire cost trick in one sentence.
Rejected uploads are a hidden per-image cost
Here is the part nobody prices in. Every image that gets generated, passes your own check, and then gets rejected by the platform's review is a sunk cost. Adobe rejects a wrong CSV header instantly. All three channels I upload to, Adobe with its 5-column header, Vecteezy with its 4-column header, Dreamstime with 15 columns, will bounce a file on metadata before a human ever looks at the art.
So a rejection that costs you zero generation money still costs you the generation you already paid for, plus the review wait, plus the risk of looking like a spam account if it happens often. The cheapest cost reduction is not a cheaper model. It is never wasting a generation you already paid for. That meant building the metadata CSVs to the exact column counts each platform demands, and keeping a ledger of what had already been uploaded so a re-run could never double-post or double-charge me.
Track cost per accepted asset, not cost per image
Once I fixed the above, I stopped looking at the invoice total and started tracking one number: what a finished, accepted, sellable asset costs me end to end. That number includes failed generations, rejected uploads, and the electricity on my tiny server. It went down for three reasons, in order of impact: batch requests instead of single shots, minimum viable resolution, and zero wasted generations from metadata rejections.
None of these required a cheaper provider. All of them required reading the pricing page as documentation.
The honest part
Everything above came out of one project: 39 packaged products, 856 MB of output, roughly 19,000 lines of pipeline code, 300+ pages of research behind the rules, all validated on a 1 vCPU, 2 GB RAM box with no GPU. The four scripts that carry the lessons, the metadata builder for the Adobe, Vecteezy and Dreamstime formats, the upload tracker that prevents double-posting, the Markdown to PDF converter, and the product packager, are the same ones I use now. I put them together as a small kit because I kept rewriting them for friends. If you want the working versions instead of the descriptions, that is what it is.
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