Join this club, get extra credit. (a question of ethics)

[Case Closed]

I am currently enrolled in a class which is centered around food and culture. The teacher also runs a club which is centered around the same thing as the class. The first day she has stated that if you join the club you will receive 25 points extra credit. Which is a pretty decent chunk of your grade. She mentions this every class and also mentions the $5 dues you must pay to get into the club. Does anyone else think something about this is very wrong? I certainly do. Anyone else have any experiences like this?

Also, if this is of any importance this is pretty much a blow off class. If I show up and take the tests I should get an A without any hard work. I don't know if that information is relevant.