Conversely 1:10000 is so close to 0:10000 that you might as well just leave it on the Bitcoin blockchain. The benefit of not doing so would be negligible.
No. Makes no sense whatsoever.
True, the choice of settlement platform is leveraged 10,000:1 in this scenario for the transacting party. As such, it probably does not much matter to the transaction party whether the underlying settlement platform is Bitcoin or a vastly cheaper alt.
However, to the payment provider -- the party who actually selects the underlying settlement platform -- that cost represents the bulk of the Cost Of Production. If any business can reduce their cost of production by a significant portion, you can be damned sure they are going to take that option.
The benefit to the party actually bearing the cost is huuuuuge.Edit: Sorry. Unintended duplicate.