Hi,
Thanks for your question!
If you purchase our bundle, the license will be valid in 12 months. After 12 months, you'll be still able to add articles normally, and the extension will continue working as the way it should. But if you need technical support at that time, you're supposed to renew license to get assisted then.
Is it clear enough for your question?
That is, if the license expires, can I still add more than 50 articles?