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OK, I asked support in chat about standard licence and they said yes. Transcript below in case someone has the same questions.
Nash Kabbara:
I have a stock plan. My questions is: I want to create posters to hang on the walls in our business and thinking of using Adobe Stock images as background material. We get about 150 customers a month. Will the standard license do?
10:30:05 AM
Naveen GK:
Let me check and help you with that.
10:30:05 AM
Naveen GK:
...
10:31:30 AM
Naveen GK:
I checked and see that you've subscribed for Adobe Stock - 10 images a month (one-year) under: xxxxx
10:31:40 AM
Naveen GK:
I see you've 117 images left to download
10:32:06 AM
Naveen GK:
So, may I know how many images you want per month ?
10:32:19 AM
Nash Kabbara:
My question is
10:32:33 AM
Nash Kabbara:
Can I use these images as background images for posters that I use in my business?
10:33:00 AM
Naveen GK:
Yes, you may Stock images for your personal or business use
10:33:27 AM
Nash Kabbara:
So with my current plan, I can use the stock images to create posters for my business?
10:34:05 AM
Naveen GK:
...
Naveen GK:
Is there anything else I can help you with?
Nash Kabbara:
NO, just wanted to ask before we printed the posters.
10:36:36 AM
Naveen GK:
Yes, you may use it Nash
10:36:40 AM
Naveen GK:
It was my pleasure chatting with you today. Have a great day!