What does this achieve? The maths on this seem absolutely terrible.

If I have 10K SPS, i can buy 10 BCX of a common card at the cost of 10 vouchers or let's say $0.90 currently - and using the average common CL card, this promo card will be worth around $0.04 each, do a total of $0.40 value.

This is a -EV transaction.

It also won't even chew up many vouchers. It's kinda pointless as far as I can tell.

What do you think I am missing, that counteracts these points?