I have bought games for between $10 - $30 for just a single game, and many of them I didn't even have half as much fun with as I did with Witchcraft or Spider World. That does of course have a lot to do with me enjoying platformer games with ingame sexscenes more than everything else, but still. The "worth" of something really varies from person to person.
Buying a membership gets you access to everything she's got, one needs to take that into consideration. And the games are just one part of her site - not the only feature.
If I can find something for free, I'm happier that way, but that doesn't mean I don't understand an artist's need for income from their work. There's a lot of time and effort put into these things. Even though some might not be into her stuff, some of us really do enjoy it