Most of the stores who accept bitcoin at the moment do it for the gimmick,
as there bitcoin's users community is not large enough to actually make bitcoin based business.
So at the moment the bitcoin accept stores do it for the gimmick or they are selling bitcoin related stuffs or offering bitcoin related services so they aim at bitcoin users community.
build small business use crypto depend on the situations on the particular countries
because you cannot build your own business use crypto if your country banned crypto but the common reason
why they build online stores accept crypto as the payment maybe use crypto is more easy than use cash for transactions
and it can do everytime and everywhere as long as internet connections available