What kinds of subscriptions are available and cost?
There is currently a base subscription which is free and premium subscription which costs $99.99 per month or $999.99 per year. Users with .edu email addresses can also try the site free for a limited time after signing up.
Can the free version be used for commercial purposes?
The free subscription is only available for personal and research uses. If you'd like to use the site for commercial purposes please purchase a premium subscription.
