At my startup, I've dealt with ~4700 reports on my own over a few years. So to me I'd guess 2500 between 5 devs, even part-time, is manageable. The #1 most abs

At my startup, I've dealt with ~4700 reports on my own over a few years. So to me I'd guess 2500 between 5 devs, even part-time, is manageable. The #1 most absolutely key aspect of the way I deal with this volume of issues is: have clear, specific bug report guidelines, and instant-close without investigation any reports that don't follow it to the letter. The goal is to (somewhat ruthlessly) train users in to making useful reports. This does frustrate users sometimes, but it's actually in everyone's interest: if they make good reports their issue is more likely to be fixed, and as the developer I can't spend hours every day figuring out how to extract information from a relatively uncooperative non-technical user. In fact at a startup there's simply not the time.