What is your overall opinion about it?
Also, how do you charge the client for it? I can see an event only having a few photos, which wouldn't make them happy after paying a couple hundred bucks. On the other hand, if the event created many hundreds of prints, I wouldn't be that happy.
Right now, I am just offering a photo booth, which is nice and neat. They pay by the hour up front, and everyone in a photo gets a copy.
Don't see how to apply that to hashtag printing.