From https://inventables.desk.com/customer/portal/articles/2892848-easel-pro-faq-and-overview
Can I try Easel Pro for free?
Anyone can design, preview, and simulate projects in Easel Pro for free. X-Carve and Carvey owners can carve Easel Pro projects for four (4) days every month without a membership. A paid monthly or annual membership provides you with unlimited access to Easel Pro.
I thought I also saw something about it in the keynote, but I wasn’t paying too much attention. I interpreted that as machine purchase providing the 4 days, but I could very well be mistaken.
Edit: also this comment