The four editions are not quality tiers. A single page runs on the same engine as a store — the difference is what you are building, not how well it works.
First, what costs nothing
Reading and taking part are free everywhere on the platform: an account, comments, forums, belonging to somebody else's community. The editions describe the other thing — creating a place of your own — and that runs on a subscription to the control panel, sold by the regional representative serving your market. This site names the tiers and what is in them; the figures live one level down, with the representative.
Start — a page of your own
A personal page or a subdomain: a profile, a portfolio, a place to publish, on an address you control. The AI in the panel is switched on at this tier too, with tokens bought as you need them — a page rarely burns many. Choose Start when what you have to say fits on one page.
Standard — one domain, site and blog
One domain of your own, and on it a website with its own sections, navigation and galleries, plus a blog. A token allowance comes with the subscription from this tier upward. Choose Standard 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 — as many domains as the trade needs
A store with catalog sections, products and brands, built to earn organic traffic rather than buy it — and, unlike Standard, not limited to one domain: sites, blogs and forums, as many addresses as you like under a single panel. This is also the only tier where an exclusive brand design applies. Details are on the Business page.
If what you are gathering people around is a readership rather than a catalogue — a book published chapter by chapter, an online magazine, a fan society — the tier you want is Creative. It sits at the same level, on the writers' and bloggers' side of the platform: qwetru.com. Same engine, same rules about advertising and profit; a different trade.
Server — the platform inside an organisation
The whole platform on your own machine, so that a company, a retail chain, a trade association or a marketplace operator can build a space of its own — stores, blogs, forums, sites for projects and for people — inside one perimeter it controls, handing out the other tiers within it.
This is not the tier for an individual merchant: a seller with a catalogue is served by Business, which already allows as many domains as the trade needs. Server is priced case by case, because what it costs depends on what is being built; there is no list price. qwetru.ru is an installation of this kind in production, with dozens of sites on one machine, and what running one involves is described on the foundation site.
How to choose without overthinking
Take 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.
If you would rather not build it yourself, a partner studio installs and sets the site up on your own hosting for a one-off fee, the same price list at any of them; panel access you then pay for directly, and that payment has nothing to do with the studio.
What is free and what is paid — and why this site names tiers instead of figures — is set out in the pricing FAQ.