It doesn't have as much to do with Krav as it does the school. Not all schools operate that way. You shouldn't have to pay for training that is supposed to be included in your monthly tuition. What you pay for the program Monthly should cover all your training. Seminars are an extra activity but they usually cover more than just Krav stuff, which makes them worth the added cost. By no means should they be a requirement to your Krav training. If there are any other Krav locations near by, I would check them out.
If your in a "Fair Fight", your tactics suck.