As an Adobe contributor do I get discount when buying images?

Just to clarify, you cannot use Adobe Stock assets for any part of the work you submit to Stock. That would be a violation of the Stock Contributor Agreement and IP Guidelines

• https://wwwimages2.adobe.com/content/dam/cc/en/legal/servicetou/Adobe-Stock-Contributor-Agreement-en_US-20240618.pdf
• https://helpx.adobe.com/stock/contributor/help/ip-guidelines.html

No. You would pay the same amount for a stock subscription that any other Adobe customer would pay.

If you fulfill the conditions you may get free Adobe software for a year. You also get paid for your sales, you can buy credits or a plan with that money, as soon as you get your payout, but there is no special price for contributors for Adobe stock subscriptions.