A: Hi. Thank you for reaching out.

Yes, you can stack codes.

The Plan (1, 2 or 3 codes) you choose on AppSumo determines in how many website you can install and use SEO Generator (3, 10 or unlimited). So with 3 Codes you'll be able to use the plugin in unlimited websites.

You'll find the Plans here:
https://appsumo.com/products/seo-generator/#pricePlans

And about stacking codes here:
https://help.appsumo.com/article/35-what-is-stacking

If you have any further questions feel free to send us an e-mail on info@seogenerator.io.

Kind regards,
Tim & Jeroen
SEO Generator