Where Fivestars is ahead
Maturity and reach. A platform with that history has solved problems a newer product has not met yet, and its consumer-side network puts your business in front of people already using it.
Bioflow has no consumer network. Your members are people you enrolled.
What Bioflow adds
The link-in-bio page. Your Instagram bio points at the same page your customers join the loyalty program from, so enrolment is one tap from where they already are rather than a separate sign-up flow.
That integration is the argument, not superior loyalty features.