They choose to be a part of a farm team I guess they don't want to waste money and instead they are using their participation to free for something that benefits their business, while also gaining something from the higher franchise, as we know how the management works and how the league governors and commissioner are working alongside to make it legal.
There's nothing fans can do to push the league to bring back those old glory they will just go with the flow and accept anything that will be offer and keep it the way it is now.
They are in the PBA to advertise their company, but PBA is not getting a good feedback from the people, so I don't think it will work. But as they say, good or bad publicity, it still is a publicity, so maybe it will work. However, for a real fan like us, we like to see this old league to grow and be competitive, but it will not happen if monopoly within is very strong, they need to eliminate that and that will only happen if they'll add more teams and eliminate the farm teams.