Membership is $100 Australian dollars, which I wouldn't characterize as "large amounts."
$100 Australian a year to join a web forum? And to join said forum you must also own their Peaceful Pill handbook, that's another $95 Australian. Exit says that their members will get a $10 discount for their books, but that's still $185 in total.
They offer other stuff as well, admittedly, which most of the time they still have to pay more money for, and most seemed like a waste of money to me, whether they had to pay for it or not. You pay about $68 USD a year to pay almost $58 for an ebook and go to a glorified convention where they can discuss topics related to suicide that you've already seen on the news (or watch videos of said convention), have a Zoom chat every three months, get access to a handful of videos that are years-old that I highly doubt contains any information that isn't already publicly available, get told the LATEST NEWS on assisted suicide that's already on the news that you don't have to pay $68 for, get a copy of a newsletter that anyone, member or not, can download for free anyway from Exit's website, aaaaand get a recording of them talking at a different convention to the one mentioned earlier, which you still have to pay $75 USD for if you didn't attend said convention, regardless of membership. There's also them offering to help people travel to Switzerland for assisted suicide, which I originally thought might actually be about the only thing worth paying for... turns out you still have to pay at least a €1,750 for the basic package of them saying they'll "help with your applications"...somehow, so it's not like you're giving them almost two grand to pay for your flight or hotel or whatever, and you can only get it if you're a member anyway (they do not allow non-members to buy it at all), and they themselves admit they can't guarantee the Swiss doctors will even accept you, with no mentions of refunds if that happens. Exit membership mostly just seems like a way to gatekeep most of their stuff so that only the old can access it, while charging stupid amounts for it. Yes, I would consider two grand a large amount of money to get Exit to "help" with an application to get assisted suicide in Switzerland with no refunds offered if they say no. Yes, I consider $68 a year a large amount of money to access a web forum, a shitty convention that happens once a year, a Zoom chat that happens every few months, a bunch of materials which if you ask me should be free domain anyway, and to either get a slight discount on some books, or just be able to pay even more money for them to maybe (benefit of the doubt here, "helping with your application" is very vague if you ask me) do your paperwork for you at best, if that's what their "help" even is, and the books and their Swiss paperwork service are both gatekept so that only old people can access them.
The more I look into Exit, the more I see them as just publicity-seeking grifters who both want to take the money off old people who just want to avoid terminal illnesses, and gatekeep being "pro-choice" by advertising themselves as being the big, noble pro-choice organisation that also only thinks that choice should be applied to old people, while throwing SaSu under the bus.