I already rebutted you (did you not read?):
You might be able to argue that they will allow users to buy things from bloggers, but users will prefer to use credit card and maybe BTC which they already have. They see no need to convert to STEEM first. Programmers will provide what the users demand. Bloggers don't want to burden their paying users with converting to STEEM first. Golden rule is never make it difficult for people to pay you. Always provide multiple payment options. Bloggers can accept STEEM from those who already have it (i.e. those bloggers who earned STEEM from blogging), but from users who have credit card but no CC or BTC but no STEEM, the blogger would prefer to make it easy for the user to pay otherwise user may not pay. We humans hate hassle points.
Of course you refuted my argument (you left out control features--that's innovation, the new way).
I don't understand what you mean "control features"?
It was mentioned above, but let's delve into a use case for advertisers.
So we assume the artist is established.
We assume that advertisers have trouble getting the attention of public.
Control features built into the steemit platform (who gets access, how much access, time of access, ect) allow the artist to offer materials for sale (membership, bounty, bid) and the advertiser can quickly get ad to public, and likely use the artist's userbase, to target population segment. Control features. This can be developed much deeper and further, but that's your expertise--I'm good at general strategy (know thyself).
You have not described any way to escape from that fact that sellers never want to force buyers to use a token they don't already have. Sellers want to take any fungible, liquid unit-of-exchange the customer has to pay with. Because sellers hate attrition (loss of customers due to pain points).
This is a golden rule of commerce.