Let me just break out some maths and graphs and ****. This is why you always need at least one Asian on the panel.
Here's a line graph of the number of posts in each season of Platinum Hit. I broke out my calculator to find a line of best fit for the data [I'm using 949.5x^3-8979.1x^2+25134.3x-18041.4 which is incredibly off but more accurate than other lines when x≥5, plus I'm tired of trying lines good lord none of them are close]. Based on that line, if the trends of the number of posts were to continue, Season 8 would have 94,513 posts, Season 9 would have 173,044 posts and Season 10 would have 284,890 posts. And that's operating on the assumption that PH7 posts are literally going to stop right after I post this.
EDIT: I found a better line of best fit [275.8x^4-3464.0x^3+14861x^2-24359.4x+13168.0]. Based on this line, Season 8 will have 125,723 posts, Season 9 will have 282,277 posts and Season 10 will have a whooping 550,170 posts.