2 observations:

First, I have noticed that frequently around 10 a.m EST to 12 a.m. EST the board is hopeless. Just to view the titles of the current posts can take several minutes. Other times, especially during our evenings, the board is very responsive. If these slow periods corresponds to peak work hours, it may be discouraging many posters.

Second, I think kixtart may have an advertizing problem. Who knows about it? It seems to me it is driven by word of mouth. Additionally, there is a lot more competition out there. Without advertizing kixtart's role may be marginal.
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Jack