I think it’s ok to have another translation management system based on i18next. I love i18next. ❤️
There are also others, i.e. there’s also SpaceTranslate…

I think what he means with “monetizing on other peoples work” is probably this:

If looking the hundreds of contributors for i18next: https://github.com/i18next/i18next/graphs/contributors

You will notice there is one person managing this since 2011, which this story is also confirming: https://blog.locize.com/2016-02-27-day-zero/

And this person is also giving almost all the support for all the github issues/PRs …

It would be also nice, If you could tell what is quiteclunky and confusing in locize…

But finally, yes you’re right… it’s technically and probably legally ok, to have another translation management system based on i18next.