Hopefully you've heard the news about the Drupal Association's new D8 Accelerate grants program, and the fundraising drive we have currently going on. If not, the gist is that the Drupal Association has created a central fund, managed by the Drupal core committers, to fund both "bottom-up" community grants for things like targeted sprints or "bug bounties," as well as "top-down" spending driven from the core committers on larger strategic initiatives that help accelerate Drupal 8's release. All D8 Accelerate grants that are provided are tracked centrally at https://assoc.drupal.org/d8accelerate/awarded, including what the money was used for, how much was spent, to whom it went, and a report from the grant recipient(s) that outlines the work that was accomplished.
However, it can be a little hard to parse from that format the larger meaning/context of this work, especially if you don't spend upwards of 30 hours per week in the core queue like most of these folks. :) As Chief Wearer of Many Hats™, I sit on both the Drupal Association board as well as the committee who manages these funds. This puts me in a good position to provide a bit of "behind the scenes" info on how the funding process works, as well as provide some of the larger story of how these funds are benefitting not only Drupal 8 core, but the larger Drupal ecosystem.