Yes. eSIMAdvice currently lists 67 Stellar eSIM Montenegro plans.
The lowest displayed Stellar eSIM Montenegro plan is Montenegro · 1 GB · 30 days · 4G · + Free VPN, at $0.59.
Montenegro · 10 GB · 1 day · 4G · + Free VPN is the current best-value match by displayed price per GB: $0.20/GB ($2.01 in total).
Yes. Eligible displayed prices already include the active ESIMTWEAKS coupon where the provider rule applies.