[seiji]

developing it all was what the business was about

It is interesting how some software is more amenable to being "business open source" than others.

If your software is touching online, realtime, and mission-critical data, that's a good fit for open source + support / add-ons. You can sell add-ons and ease of use and peace of mind. Some databases have been good open source companies, some have failed, and some are just chugging along not being successes or failures (definitely counts as a VC failure though if you're not a breakthrough success).

If your software is more off-line, or one-time use, or "nice to have" (e.g. a great text editor or a great file upload utility or... sysadmin HDFS deployment helpers) and you currently charge $100/seat for your magic sauce, that seems to be an awful fit for open source. Everybody would use it for free and never consider buying anything from you since it's not "real time mission critical."

Open source is preferred to maintain strong data portability, avoid vendor lock-in, avoid vendor future price increase/licensing shenanigans, and also to get a stronger pool of employees since many may likely have used common popular OSS platforms elsewhere too (less re-training needed in many cases for new hires).

[atomatica]

Excellent point. Can you imagine Adobe open-sourcing their software to instead focus only on services?

Neither can I.