Yes, there is a Business Meeting every year. Someone planned on introducing a change to specifically allow (but not require) online Site Selection voting at this year's meeting, but was persuaded to withdraw it. There is a strong sentiment out there against introducing any non-trivial changes this year on account of the ratification will be in Australia, and thus likely to be a very lightly-attended Business Meeting.

The key difference is that with Hugo voting, you don't have to pay money at the time you vote; you have to be a member, but there's no additional fee to vote. To vote for Site Selection, you not only have to be a member, but you have to pay the Advance Supporting Membership ("Voting") Fee. Online voting effectively forces Worldcons to have credit card/PayPal acceptance. This disturbs certain significant members of WSFS Business Meeting fandom.