They tried and learned that most FOSS don't want to pay for their tools, so they turned their focus to those that actually care to pay and have been doing quite alright.
Numerous frameworks didn’t even bother to turn to FOSS, and maybe they’re also doing alright. We cannot be sure though, cause no one knows their name.
The point of going foss, in my long-distance bystander observation, is to create an essential part of the market: skilled developers. Not to push your sales to everyone’s face, nor to whine that deals are too cheap. Foss folks will never pay, because they are not business for client, they are people for people (who work for business and sometimes make tech decisions based on a weekend experience).
That’s lame argument, if it is, and I don’t feel like nitpicking. Almost all of these are either dual-licensed free to use for foss folks or charged very indirectly.
You still cannot be full-commercial and not have sap/oracle-like salesmen squad.
The point of going foss, in my long-distance bystander observation, is to create an essential part of the market: skilled developers. Not to push your sales to everyone’s face, nor to whine that deals are too cheap. Foss folks will never pay, because they are not business for client, they are people for people (who work for business and sometimes make tech decisions based on a weekend experience).