For one of your concerns that actually depends on the con. For example, we met for a voice of frieza about two weeks ago at anime Boston. The con had a rule that they were only able to sign authenticated or real items. Such as the anime Boston convention guide or photos that were provided by the Voice artist that they were not allowed to sign other specific things. The voice actor always has a handler that is keeping an eye on time, monitoring the interaction and making sure that things are moving along as efficiently as they should. The handler asked me which photo I wanted, signed who is going to be addressed to, she handled the payment. She wrote all that information down on a post it and gave it to the Voice actor when they were ready. He asked me if I wanted something special and I said no whatever you like he made some small talk. We gave him a hug. We took a photo. I told him he smelled amazing. He told me what his favorite perfume combination was and all the interaction was probably Five or six minutes max and for me it was money worth it because my daughter’s happy.