How about once a week or month reduce spellbook to 0, and offer free spellbook with rebellion pack combos ranging between $18 to $90? or your offer but only weekly or monthly?
If your proposal is accepted as it is, could you stipulate future pending on new Splinterlands account sales > current monthly spellbook sales after 1 to 3 month trial?
Proofing this change does not harm but improve current spellbook weekly/monthly revenue should be top priority before this change becomes permanent.
This comment was made during pre-proposal phase. Now this is a proposal, and there has not been any changes, I cannot vote yes until you address all suggested changes?