I'm a paying member. A In my opinion there are several 'problems' with TB:
1) Some basic modules such as a payment module (mollie) or shipping modules (myparcel, send cloud) are outdated. The modules or not updated for TB/PS 1.6
2) Lack of communication about the roadmap of TB (what can we expect in the near future from TB).
"The team is working on a surprise. When they are ready, it will be revealed. 🙂"
Investors don't like surprises and uncertainty. I think the same applies to (potential) users of TB.
For now TB still works for me but I think in the future I'm forced to with to another platform. Not because I wan't to, but because basic functions as mentioned above, don't work anymore.
The 'membership' modules are nice to have, but are useless without good basic modules.
We will see what the future brings