Perhaps somebody better than i can make something of the experiment i did here.
Friday, i bought one of the $50 deals, netting some 9k diamonds. I've never dropped so much cash before, but for me, $50/month would be moderate spending, and is well above what my actual average monthly outlay amounts to. I wanted to see how well a moderate spender could make out out with a stretch effort. Of the 9k diamonds, i spent ~7k, and ran out of stam refreshes, and you see where i ended up. If I'd bought stuff in shops to chew up the remaining diamonds, I'd still have fallen short of the top progress tier, so i didn't bother.
As it was, i fell just short of the top 1%, and made about 1/6th of the points of the #1
On $50. We talk about whales spending thousands for contests, but i think those are rare birds. Mostly just ppl who spend less money than they do on booze or the collection plate at church, whichever you prefer.
Of course others will draw different conclusions, which I'd be glad to hear.
Edit s6, vip11, for the record.
2nd edit: 1/8 rather than 1/6 of top player. I suck at mathing.
edit3: the 55 or whatever stam pots i got with my $50 purchase are also a factor, since i dont hoard...anything.