Who's behind it? Wild Apricot was a product of BonaSource Inc., originally a custom web application company. Bonasource Inc was established in 2001 with headquarters in Toronto, Canada where we remain today.
It seems plausible most of Ethereum's IPO came from Vitalik Buterin's father Dimitry Buterin, who is a multi-millionaire. Coming from a father who is rich also allowed Vitalik the opportunity to edit the Bitcoin Magazine, without worrying about cost of living, and later to drop out of college to pursue a startup like Ethereum.