Isn't the way out of this via open source and community efforts essentially why Firefox has been successful despite not being OS bundled or backed by a huge search engine company like Google?
Isn't the way out of this via open source and community efforts essentially why Firefox has been successful despite not being OS bundled or backed by a huge search engine company like Google?
Firefox definitely does benefit from community contributions (a lot), but the vast majority of the important code is written by paid employees.
I don't think GP has any issues with Vivaldi being developed by paid developers per se, but if Vivaldi Technologies decides to stop development there is no guarantee that anyone else will be able to take over development. Firefox wouldn't have that issue if it started today.
I don't disagree that it would be better if Vivaldi were open source. I just don't think that reason is all that compelling to Vivaldi the company. Who thinks about "what happens when my company folds"? There are other advantages to being open source than just that.