1 comment pageview consumes 1 credit.
When someone opens a page with the embedded comments widget, the widget will fetch the first 100 comments. We call this request which fetches up to 100 comments a comment pageview.
Creation of comments and storage of comments is for free.
You top up your balance with credits you spend if you or
your readers browse the comments. Estimate the costs using the slider.
500 000 of credits
Sign up and get 1 000 free credits for a trial period
For example, you got a site with 25,000 pageviews per month. For example, only 80% users scroll down to comments so this reduces to 20 000 comment page-views. It would cost 20 000 credits or just $0.3 per month.
Of course, you are free to include the comment widget not for all users but only for those who need it. But JustComments is already optimized to request comments only if the user scrolls down to the comments section.