First of all, hello, I'm really glad that you showed my game as an example. I have a lot of friends because of where I live and because of my job. I thought the same as you about this, so I emailed Spinoff Support. The information I got from them is that voters are not required to have a Spinoff account. If you wish, I can share my itchio data with you :) Also, thank you for the nice explanation of Spinoff.