I pay $99/mo. for this forum
https://stmforum.com.
$20/mo. for this one
https://afflift.com
Both of these forums have helped me grow my business. A lot. They help me generate new ideas and the vendors are constantly providing discounts on their services.
Other than connecting with a few industry people here GFY has been worth about what I pay for it.
If you want to breathe new life into GFY you will have to kill the "remember when" culture that seems to be so prevalent and start focusing on people making more money today.