Is anyone surprised that so many of those are payed services instead of OSS projects?<p>I understand payroll, analytics and others like such. But things like bug trackers, dashboards, CIs, exception handling, log monitoring. At some level maybe it is a bit like selling shovels during a gold rush. Find what most start-ups need and monetize that. The gold prospector has a high chance of going home empty-handed, but he will surely need a shovel to even start digging.