I noticed such a feature - the project starts at a high speed (500+ VpM), but after 20 minutes (2000 links) - the speed drops dramatically - 10 and lower Vpm
an hour later 1 VpM
I bought several auto-aproved list (300k - 600k), paid proxy, do not use search, but the situation is the same - a maximum of 6000 backlinks to the project during the day (all platforms are highlighted). After that, the speed is so slow that it makes no sense to continue the project.
Maybe this is a normal situation? why with paid auto-aproved list 300k-500k + can only do so few backlinks?
and the speed decreases exponentially.