An Explosive Success grants a player the privilege of rolling an extra die and deciding if they want to keep the die or not but does their ring limit still count toward if that result can also be kept or can this die result be kept in addition to the other kept dice equal to the used ring's value?

Just now, daddystabz said:

An Explosive Success grants a player the privilege of rolling an extra die and deciding if they want to keep the die or not but does their ring limit still count toward if that result can also be kept or can this die result be kept in addition to the other kept dice equal to the used ring's value?

In addition. Only the initial die with the Explosive Success counts against the ring value. But you need to choose all kept dice before proceeding to roll extra dice for the Explosive Successes.

This.

You only resolve explosive successes on kept dice.

It's at the point you choose kept dice from rolled dice that the limit of ring + seize the moment + assistance applies - there are quite a few ways to acquire 'extra' kept dice (air opportunities in combat and a few school abilities like Speaking in Silence for examples).