The developers decided to provide information about themselves or preferred to remain anonymous and not introduce themselves?
Best way to know about that is to be always active in telegram and thier social media sites. I doubt that they will remain
anonymous forever. Maybe they are just prioritizing the development of the project first before thier grand introduction.
Most devs usually do this anyway, most especially when there is a lot at hand to do. Like you have said, they obviously cannot remain silent forever and at least, they have a GitHub code displayed and I believe on way or the other they should still be answering some questions on their telegram page. Moreover, using the word anonymous makes it sound like the team are not totally known, but their identity is on their website and being silent and not saying much does not mean they are anonymous. Just thought I should correct that.
https://pura.one/team/