I think that you should auction the weather bet platform rather than selling it for a stable price. The platform looks solid an stable, I think that it mostly lacks marketing right now.
I think they tried that. It is quite a unique idea but I think a little too unique, though maybe that can be its selling point. 4btc seems quite cheap so I would agree with others and try get some investment for promotion on here or something. Maybe run a signature campaign which is good to get your business brand out there.