If the end-user is concerned with the code and what it's doing and knows how to read and understand it, a software that is source verifiable will do the job. It doesn't respect the open-source ethos, but the reasons why that company and/or its developers decided to do that shouldn't be the end-users concern. You are free to use it and verify with your own eyes what is written in the code base. Anyone can share their feedback with the developers if they want to, regardless if the code is open-source or not.