As of today, our Plus plan can be purchased with a discounted AppSumo Deal.
Be sure to check it out here: https://appsumo.com/marketplace-eniston-knowledge-bases/
The deal includes our Plus plan for the duration of 1 year. When the year passed, you can choose whether you want to continue using eniston and subscribe to either the Plus or Business plan (currently "work in progress"), or to let your deal run out. You won't loose your data when your deal runs out, but you'll loose access to some functions. And if you used a custom domain, it will be removed.
If you have any questions, reach out to email@example.com or get in touch on Twitter.