Railway wouldn't able to offer that, sorry. they are at the mercy of GCP's egress fees, and GCP doesn't even offer bulk discounts.

I have subscribed to the pro plan, but the certification here is still a hobby.

you correctly have the Pro badge

After subscribing to the pro plan, I found that the hobby plan still exists.

yes that is correct

Will the hobby plan continue to deduct fees?

yes

Is that equivalent to a fixed monthly fee of $25?

$20 for your Pro seat, and $5 for the Hobby plan, and any resources you use on the Pro plan

if you have no projects running on your personal hobby plan you are more than welcome to cancel the plan

Got it, understood.

please use english only here