The four editions are not quality tiers. A free page runs on the same engine as a store — the difference is what you are building, not how well it works.
Start — a page of your own
A personal page or a subdomain, free, and not a trial that expires. This is the right choice if you want a presence you control: a profile, a portfolio, a place to publish. It stays free on every server, and no server owner can change that.
Standard — a real website
Your own sections, a blog, galleries, your own navigation. Choose this when a single page stops being enough — when you have services to describe, articles to publish, or a structure worth navigating. Details are on the Standard page.
Business and Creative — a store or a community
Business is a store with catalog sections, brands and the blogs and forums around it. Creative is a fan society: a book published chapter by chapter, characters, authors, readers with accounts. They are the same tier from the platform side — the name simply reflects what you are gathering people around. This is also the only tier where exclusive brand design applies.
Server — hosting a community of sites
The whole platform on your own VPS. You host pages, sites, stores and communities for your circle, and the advertising revenue on your server is yours. qwetru.ru is this edition in production, with dozens of sites on one installation. What running one actually involves is described on the foundation site.
How to choose without overthinking
Start with the smallest edition that fits what you have today. Moving up does not mean rebuilding: the content, the address and the design stay, and only the set of available parts grows. The expensive mistake is the opposite one — paying for a store before you have anything to put in it.
What each edition costs, and what is free versus paid, is set out in the pricing FAQ.