For Marketers/Advertisers, I would say accept the truth because Post Joint is a good place to "Advertise" in affordable rates. I usually charge £119 for advertising and £50 for Guest post. And many companies are happy with "No-Follow" because of the traffic they receive. Most of the advertisers provide quality content.
The advantage here is that on Post Join you can choose any budget you like. One of the Post Joint advertiser contacted me asking to place links for $20. I said you can do this through Post Join and if you contact me through my blog I will charge £50.
Understand the value here and policies by Google and don't be too greedy for "do-follow". If you have a great content, I will publish it for free!
Also, my blog got penalized and many Post Joint marketers contacted me to make it Do Follow. I said sorry I have to make them no-follow in order to remove the penalty. Now I am not publishing any Guest Post that is asking for do follow.
I agree, also provide more reason for decline of new advertiser account.