Hey, I am the technical guy behind this service.
This service is strictly contextuals and it will take a lot more time for the pages to index since new pages are created for every link. See, blog comments - guestbooks - trackbacks post on pages which are already indexed. And therefore you will see them being picked up on Ahrefs/Majestic very quickly. But then if you are doing web 2.0s/articles this does not happen.
I am not very keen on using an indexer since there are only about a handful of ways to crawl links (not index) in bulk and they leave obvious levels of footprints. Every single one of my blasts are different and targets are being scraped real time in order to cut down on link loss as well. As far as contextual SPAM is concerned, this is easily the best service on BHW. (If you show me something better, I will give you a free blast

)
I am not here a lot, you can take my word OR contact me (via Marko) and I will take care of any issues personally.
I had a few people contact me and they ended up being very happy with what they received.
On another note, anyone buying over 25K contextuals can distribute the link quota in any way they want. Say for a 100k pack, you can divide the link quota as two tiers (20k on T1 - 80K on T2) - just mention it in the order form and I will have it taken care of.
We will add 2 variations of spam
- Dirty
- Clean
Dirty gets more domains, indexes faster but also uses blog comments, guestbooks, trackbacks etc
Clean is contextuals, takes long to index, steady low risk.
Marko will take care of that and he will update this thread once this features goes live.