You can buy the game + beta key, after choosing what level you want to contribute you will have the option to add some features like the beta or extra copies of the game. You can go back and fourth between the pages to compare.
Best of luck!
Silly indeed! But it's your choice, right? I wouldn't want to keep other people from playing around with the game. Not that I'm too bothered either way, I like keeping stats to human levels.