Blargo is an actively developed theme, so its authors (the Broadstreet team) are always open to idea that would help you and the community of publishers using the theme. You can make feature requests in a few different ways.
1. The preferred way: Opening an “issue” on the github project page. This is where the source code and general issues for Blargo are managed. It required having a WordPress account. Submitting requests this way ensures we never lose track of them: https://github.com/broadstreetads/blargo/issues. Just visit that page and click the “New Issue” button.
2. The other way: You can email a feature request or bug to firstname.lastname@example.org .
In any case, try to be as descriptive as possible. If you are submitting a feature idea, for example, explain the use case, how you imagine the feature would work, and whether you think other publishers would be able to use it.
If you are submitting an bug report, add details like any error messages you received, unexpected behavior observed, and screenshots, if possible.