What Stars are
Stars are Telegram's own in-app currency. A user tops them up inside Telegram and spends them there. For a seller of digital goods that removes the most fragile part of a small sale: the card form on a page the buyer does not trust yet.
There is no payment provider to sign up with and no processing account to open. The buyer taps, pays with a balance they already have, and the Stars go to your bot.
What it is good for
Stars fit digital products: a file, a template, a preset pack, access to something. The price is a whole number of Stars, and there is no currency conversion to explain.
They are not the right tool for a physical order with shipping and variants. Those still work better as a normal order you fulfil and collect for.
What it requires
Two things. Your own bot, because Telegram routes the payment to whoever owns the bot, and a paid App plan. Both are checked on the server, so a shop that does not meet them will not offer Stars rather than failing at the till.
A product mirrored from another marketplace is never sold for Stars, because the money for it settles somewhere else. That rule is enforced on the server too, not left to a setting.
Where the money goes
Onto your bot's Stars balance, in your own Telegram account. BotLaunch is not in the path and takes no cut. Turning Stars into money is Telegram's own payout system, not something the platform runs, so the terms are Telegram's.
Running it beside card payments
Stars are a second rail, not a replacement. A shop can price a digital product in Stars while taking card payments inside Telegram for everything else on a paid plan, with card money going to your own Stripe account. Buyers pick whichever they already have.