I’m using the Relentless Network too. The links are really value for money and a lot of my money sites are ranking after using them. The support is also awesome.
I know ArchSEO via a private skype group, bought lots of links since 2014. You pay it once and your links stays on the network for life. I ranked lots of my money sites with the links.
Ordered a package from ArchSEO on the 1 month ago and already two of my main keywords shot up to top 5 of the first page! Will be ordering more soon.