So, it's time to summarize the current state of our project.

With the help of users of this forum we performed a thorough testing (thanks to everybody who participated). We have worked a lot to make our service better and the main features up to the moment are:

1) Miner's fee rate for output transactions is controlled by users,
2) JS-free version of our interface is implemented,
3) REST API is implemented.

We also performed 1-week signature campaign. Now we have customers using our service with some periodicity. For the whole period we have mixed around x5 of our reserve.

Currently we are seeking for the ways to attract people's attention to our service and find some investors. Hope that soon our press release will appear on one of the news platforms devoted to cryptocurrency.

We still have directions to develop, however we need to increase our reserve before digging into development.

We also want to increase the trust to our service and the following idea comes to mind. What if we publish our backend source code? Of course, nobody can check that this code is installed on server, however anybody could read it and make sure it makes sense. What do you guys think about that? Would you be interested in seeing BitWhisk source code?