How to use RANKERX for perfect WEB2.0 backlinks

It's been a long time since I used RANKERX.

However, as shown in the photo, only about half of the 40 site lists are successful.

It's a pity that there are many good sites that fail.

What should I do about sites that don't even list the reasons for failure?

I have almost 100% completed the settings required for RANKERX, including proxy, captcha, indexing, and comprehensive email.

Additionally, I have a question: Is it recommended to only use premium WEB2.0 blogs on RANKERX?
I wonder if the premium WEB2.0 profile is also useful.

help me

try reduce the number of concurrent threads and related ones in settings and see if that increasing the success ratio, and i suggest keep the premium sections sites for your T1 links and others as T2

stick with the premium ones, others do barely get indexed, very less known with low authorities,
don't bother with the profiles as well, most of them will require the same resources, costs, etc...
stick with the premium web 2.0s and use GSA contextual links to power them up