It was at eatingmemory's service - very similar to lover's though. Found that lover's were not showing in Majestic or seemed to be increasing any of the Web 2.0s metrics, whereas eatingmemory's did. The Web 2.0s T1 were actually from ofuture/SeoPez.
The plateauing after the initial boost reminded me of share prices. The keyword hit a ranking high, dropped slightly below that and returned a few times to exactly the same high (but never passed it). Basic stuff, but as in share prices something must be holding the keyword back - page or domain "authority" most likely in my opinion (i.e. more links required).
The PBN test is on a plateauing keyword but also thinking I will do a second test with adding more Web 2.0 links to a keyword with previous Web 2.0 links.
PS: Also running a journey thread at the moment where I will be blasting links at the home page of a new site and see how that works. The site is about 3 months old, how no backlinks......and ranked for jack shit