So I'm on a Web site that's selling something I most likely want to buy for my magazine, but it won't let me. There is no way to find out prices, much less place an order. There is a number to call, but it just put me into an automated system that, after 10 minutes, dumped me into an anonymous voice mail. There's an e-mail address, along the lines of firstname.lastname@example.org, which doesn't give me confidence I will ever hear from a human, either. In the annoyance level, this may rank even higher than not being able to find a company's physical address or phone. And it's so stupid—their business is to sell me something, and they won't let me do it.
Please, I beg of you, do not do this to your attendees on your meeting Web site! Right now, go to your Web site and try to register. If the experience isn't seamless, fix it.
If you don't make it incredibly easy for them to buy what you're selling, they, like me, might just give up.