Why not simply make it subscription only?

Name a monthly fee, and the required number of subscribers - and if that doesn't do it, let it die.

A shame to offer your hours and concern at a loss.

__________________
Chev.

2009 XT660Z
Gone: 2011 Moto Guzzi 1200 Sport,
1996 XRV750, 2003 R1150GS.