Maybe it's about time those club aircraft were fitted with FLARM, and this additional benefit help justify/fund that. Maybe that is better than focusing effort onto non-FLARM things. Nothing is free, hardware, the cost of people time and hassle for implementing anything, including testing out new unproven software and workflows, losing track of charges etc. is pretty real.

Perhaps, but that is still expensive, and does not solve the problem of no knowing who is being charged for the flight...

There are multiple examples of programs that the community has put together that are not cost-prohibitive, proprietary solutions...XCSoar for one. I understand there is significant development time and effort required, but I believe that is fully worthwhile if it would be of benefit to the large number of small clubs that struggle with tow logs.