Yes. eSIMAdvice currently lists 50 Always Mobile Bulgaria plans.
The lowest displayed Always Mobile Bulgaria plan is Bulgaria · 1 GB · 7 days · 4G, at $2.14.
Bulgaria · 50 GB · 30 days · 4G is the current best-value match by displayed price per GB: $0.51/GB ($25.65 in total).
Yes. Eligible displayed prices already include the active ESIMTWEAKS coupon where the provider rule applies.