Yes. eSIMAdvice currently lists 33 AlpineSIM Isle of Man plans.
The lowest displayed AlpineSIM Isle of Man plan is Isle of Man · 500 MB · 1 day · 4G, at $0.75.
Isle of Man · 20 GB · 30 days · 4G is the current best-value match by displayed price per GB: $0.84/GB ($16.76 in total).
Yes. Eligible displayed prices already include the active AFFINCO coupon where the provider rule applies.