Although I completely agree that what you describe would be a great product. If you are throwing together GUIs with dash what's wrong with using electron for making them into web apps? is this more of a hassle than I am imagining?
(I think) His point is not that investing is a zero sum activity but that active trading basically is. For me to make money day trading someone needs to loose money. The total "growth of the pie" is a slow process that you capitalize on by buying and holding.
You should probably give your price tiers names. Just having different price points without different product names is somewhat confusing. Named price tiers also makes bookkeeping easier to organize. Also I'm curious how you rationalize these price points. Why is the base tier for 150 users? (that seems high) What is the median size of a paid telegram group?
I highly recommend you stop using YouTube. It has become more addictive overtime and it will get worse. Shorts is really intense but I think YouTubes recommendations are almost just as addictive. I agree with you that some content is worth keeping tabs on. If you want to break the cycle could replacing going on the website YouTube with an RSS reader that supports subscribing to individual YouTube channels, I use feedbin but I think there are a lot of RSS readers that do this. This eliminates shorts and recommendations which really helped me.