While running some campaigns the other day on StumbleUpon, we came across the following new error message during the Discovery process:
The new message indicates that either currently or in the future at some point, StumbleUpon is going to be limiting the number of pages you can discover from a specific site per day.
Even with the above message, the actual Discovery itself went through fine, so it is likely that this feature is not active even though the message was displayed. We have been testing and trying to push any limits that might trigger this message again, but have not been successful.
It does make you wonder if this is something they will be implementing in the future though.
If you have received this message, please let us know.