Not sure where this concern is coming from.
The only statements ONeZetty makes related to exchanging PIVX for fiat are;
"... being realistic, it will be necessary to convert this first transfer in Fiat, since otherwise it may not be possible to start ..."
"To convert the PIV to fiat I will be able to make the necessary arrangements using traditional payment channels, if the ambassador [vendor] is not able to do so."
In other words, he doesn't want to do exchanges, but understands that in order to move forward, initially it may be required.
At a high level, there is 4,000 PIV for this proposal. Even if he took an extreme 10% exchange fee, we are then talking about a grand total of $80. From that, there is indeed real fees that ONeZetty would have to pay anyways. So, I would hardly call this a 'banking business'.
It just seems questions like this type of questioning is 'micro-managing'.
Besides, there is absolutely no way to 'police' if such an exchange happens or not anyways. But, we do know the vendor will have the option to exchange PIVX to fiat any ways he/she likes as it is a free market.
Basically, if these questions are sincere, then there is no trust and you should just vote NO.
I just look at it this way ......
If we get 10+ images, plus a story, from each of 4 vendors, for a total of 4,000 PIV, that works out to 100 PIV or $18 per image to post all over social media, each of which 'screams' the message of "Adoption, Adoption, Adoption!". That is an extremely good deal!
When we get those images, and stories, over the course of say 3 months, THAT is all we can measure, and how we should judge the value of this proposal.
The rest doesn't really matter.