This is surprising and disappointing. I am sympathetic to the need to raise funds, but even if this does raise some money, let's not pretend that having a paid job board is a benefit for the community. There will be fewer job posts, mainly among the jobs that are hardest to find and fill (those posted by individuals, which will disappear).
Despite hearing that the board has talked about this for years, as someone who hasn't been privy to that discussion, it definitely comes across as a drastic and hasty decision that the IxDA Board has suddenly decided to monetize the member list and its activity with just a couple of days notice.
-Adam