Github costs $4/user/month, sentry costs $25/month, and 2 digitalocean k8s clusters costs $20/month. For $175/month I can have a decelopment environment with basically 0 maintenance for a team of 25 people, including monitoring and alerting for my app.
Compared to running a local gitlab instance, deploying OpenTelemetry and running my own k8s cluster in aws, it's a complete no brainer to buy SAAS.
These potential vendors have zero or near zero additional cost to activate service (eg: the OptiTap is only a few tens of feet from where an ONT would be install), yet the sales reps call me every few months asking when I want to light up service and aren't ready to even talk price or SLA, despite knowing what we pay their competitor.