Personal vs. commercial
A Personal licence covers your own projects and one project for a single client — a website, a printed flyer, an app icon. A Commercial licence is needed the moment that end product is itself for sale, such as a template you resell or a merchandise run, and covers up to 5,000 units. Extended Commercial removes the cap and adds unlimited team seats. The product page shows which tiers the seller offers and what each costs.
Fonts and e-books
Fonts are licensed by use rather than by project: Desktop for print and static design, Webfont for self-hosting on your sites, App for embedding in one application, ePub for one digital publication. E-books come with a single-reader licence: one copy for you.
Attribution rules
No product on the marketplace requires attribution. A seller may ask for a credit on the listing, but it is a courtesy, not a condition of the licence.
Common mistakes
The most common mix-up is buying Personal for a client project that is later resold as a template. When in doubt, buy the Commercial tier — it is cheaper than sorting out an upgrade afterwards, which for now goes through a support ticket.