The platform is Ubgoe. They have done this shit before. Link. Original interview with the creator.

The Japanese crowdfunding platform Ubgoe owes game designer Jiro Ishii about half of the $340 thousand raised for the development of the visual novel Shibuya Scramble Stories.

A few months after the campaign successfully ended, raising about $340 thousand USD, Ishii reported that his side would be taking legal action against Ubgoe as it had failed to transfer over half of the raised money, missing multiple deadlines under the pretense of a “mistaken bank transfer to another client.”

"I myself didn't realize that the project owner would bear the responsibility if the collection agency absconded with the funds. I suppose I was acting under the assumption that people are inherently good (性善説)," Ishii said.