This seems like a dramatic and sudden way to end vouchers. It appears you and Matt are making two main arguments.

1. Vouchers are difficult for new players to understand.
2. Vouchers reduce the amount of DEC burnt which directly hurts the SPL economy.

I agree with both of these valid arguments but instead of gutting the voucher system entirely would like to suggest:

Removing vouchers from pack purchases, energy purchases, or anywhere DEC is required for payment.

This will remove any obstacles new players may encounter when first looking to make purchases. It will also reduce the strain vouchers place upon the SPL economy.

Now, it also seems clear vouchers need more usecases. Let's move them away from being discount coupons (which is boring) and towards providing excitement and interest. Here are some usecases I would gladly burn vouchers for:

• Gaining access to special ghost card tournaments.
• Allowing Runi to be used both on land and in battles simultaneously (requiring a voucher burn per season).
• Purchasing special items from store which can only be bought with vouchers. Very low mint skins, titles, potentially even 1 of 1 mints for ridiculous voucher sums.
• Implement a special type of land. A 'Witch Doctor's Campfire'. This doctor demands tribute in the form of burning vouchers. In return they will bestow a boon upon you and increase your chance of receiving totem fragments (make the % random and maybe unseen).

These are just a few ideas. I'm sure the community can come with 10x better ones.

Vouchers don't need to be an economic sink or an added complexity for newcomers. They just need to be fun and provide interesting and at times wacky bonuses. This along with attaching some RNG for potential jackpot outcomes to their new usecases and I believe people will be happy.