> An app that wishes to "farm" merchant data or always be presented to the user is simply going to claim support for as many payment methods as it knows about with the bare minimum filters.
There's no 100% guaranteed way to avoid this, but the user agent can use own signals to detect such apps and penalize them, somehow. I don't see how this affects the spec, though.
> Another possibility is that browsers intelligently order options presented to the user based on how often that option has resulted in a failed request in the past?
We plan to do this.
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