good analysis @achim03.
I am not into splinterlands, but i have a few dec in the game and also got some SPS,SPT and Vouchers from Index tokens.
I do claim SPS in the game everyday and stake.
since i am not going to buy any packs, i will sell the vouchers.
I think that the vouchers are way too expensive and I prefer to sell them and put the money aside to buy packs later :-). Or as you do use the income from the vouchers for other things...