some kind of mechanism to increase the buyback offer price over time

@bryan-imhoff, Thank you for your question. The User Issued Asset will be bought at about $1 plus a share of profits as profits of ZAPPL will be used to buy back ZAPPL as well. ZAPPL as a business will gain value as well as from the posts on STEEM which will also increase the value of ZAPPL as a whole. Which will in turn increase the value of ZAPPL for token holders. Hope that help answers your question which you seem to have a better understanding on another thread you read as well.