Hi Dr. Worm. I don't usually try to explain StockCharts policies because I don't work for StockCharts, but as a Subscriber here's why I think there is such a rule.
Ihub forums are followed by hundreds of people. I imagine some of the forums are probably followed by thousands. Every time someone opens a post with charts, that creates activity on the StockCharts servers. More charts = more band width and server activity. An open ended policy might result in overburdened servers at times. If someone created a post with 10 charts and 1000 Ihub members open the post soon after it appears. Then 10,000 charts are produced.
As a Subscriber, the policy makes sense to me.
There may be a post early on this forum where the policy was explained. If you find it, let us all know.
Cush