It is not needed I guess. When people got experience they got it from their mistakes. In this forum you can learn a lot and interact with many user that have already had experience and you can learn something interesting in this forum.
Yes, justification of need of new social platform only due to currently existing platforms are heavily spammed does not sound good as spammers and controlling them is part of every platform. Moreover, Op is purely seeming like a paid advertisement for that mentioned platform in open discussion forum whereas official announcement board is already existing for such things in the case OP is missing out.
probably paid registration is better, if you want to focus on more educated people, as you mentioned. thus people who interested and understand would join and floodmakers would be too greedy to pay
How many paid membership/subscriptions you are already having ? I have zero. Everything and what I need to know about this crypto space is already available for free cost from this forum and from few news sites and then few other social media groups and channels. I will never opt for any paid things as there will be no guarantee of spam free environment all the times.