Unfortunately, you're supporting the dictatorship in Russia by providing your services from abroad. Russians understand that the sanctions are going to hit them hard because of Putin's actions and only Russian people can stop him. The change can only happen from within - poor or rich, weak or powerful, everyone in Russia needs to stand up against Putin to stop the war.
The only band I know you can book via GitHub pull request - Raw Funk Maharishi. They've got data focused blog too. Amazing
http://rawfunkmaharishi.uk/blog/
Agreed, super vague details about the usage, how long the web client was used, who are the users etc. Doesn't mention how drained the battery was with/without the app at the end of each day. Such studies, apart from providing some basic information aren't very good at proving any specifics.