We'll consider an alternative then. When it comes to exploring platform solutions there is enough overhead in just evaluating them, and it's not worth the time investment to even try them it in the case where we'll also need to negotiate a license if they were to be a good fit. My company is happy to pay for services if there is a supported product that makes us more efficient, but since your cloud offering is being discontinued, the only way we could consider using it would be under a more open license that we could develop on top of.
I hope that doesn't sound like I'm not considering your right to choose the license -- which obviously up to you -- but I thought I'd articulate how we have to make the decisions around platforms. If you're not monetizing it at this point, you might get wider adoption from the open source community if you changed the license, but maybe you have really good reasons for keeping it GPL that I'm not thinking of.
I'm disappointed I came across Orchest just as you were shutting down the cloud offering -- looked like it has a really well thought out UX that I haven't seen from many other data pipelining platforms!