But the share earning rates are so unappealing for that kind of system. Right now, 1 Share = $0.000138 per day
The current amount of PTC ads allows earning ~0.50 shares per day. Since level 1 referrals give 25%, you can earn a daily maximum of 0.125 shares per referral, considering they click all 48 ads.
Promoting isn't exactly free. I find it very hard to get a return on your investment promoting. When working for such small values, I bet many people will give up with time, thus needing a constant flow of new referrals.
But, okay let's say this does work.
The upgrade option is still ridiculous.... For example, $25 for a 1 month membership, where you get 200 shares per month. That's ~2.5 cents per day of earnings. 75 cents per month. There's no increase whatsoever in the referral earning rates. All you get is the chance to get referrals. I never tried that in Donkeymails, but what's the chance of getting referrals through that link insertion thingie?
You also lose 9 shares per month.
If you keep on buying it, you'll eventually reach 6000 shares, at which point the daily earnings compensate the membership cost (assuming earnings per share remains relatively constant). 6000 shares would be $750. In terms of time, it would take 2.5 years.
Yes it would be less using the yearly membership, but it's just to have an idea (I also didn't count the shares lost daily).
That's a pretty big investment in order to start getting some profits, not to mention ROI. And you shouldn't exactly stop halfway, or the daily share loss will eat away at your total share count.
That's a bit of a hardcore upgrade. Since it brings almost nothing of value to active promoters (same referral comissions), I don't see much of a point. It's quite risky if you ask me.
Edited: I've been underestimating the effect of the daily -0.15% of shares. Even at the 6000 share count, that's 9 shares you lose per day, or 270 shares per month. That means that even spening $25 every month is not enough to stop your share count from decreasing.