ideas for the future

Ok so if I do a one time only payment system, I would be offering different sized boxes. Following a basic theme each month, the boxes would have items up to the amount of the tier, maybe a bit more in worth. 

Example: $25 box would have a key chain or pin + 3 stickers. $50 box would 1 key chain or pin + 5 stickers + 2 post card prints and so on. Up to a $200 box that would include being drawn into one of my comics as a character or reoccurring background character. 

If I stuck to monthly I will be moving to a more formatted version. So $1 would remain the same, $5 would be strictly sticker, $10 would be just the mini print, $15 would be the sticker plus the print, $25 would be a themed mystery box much like the one time payment system and $50 would be same concept as the above box but with a hand drawn sketch card of a character of your choice, like a commission. 

What are your thoughts? I could use the feedback here people.