I registered with OGAds a month ago without any issue. I didn't provide any proof of earning or what so ever. I was just honest enough to explain to them how and where I'm going to get the traffic from (i.e:- from my social media, I don't have any website yet..neither do I have thousands of followers). I told them I'm a complete newbie to this. Convince them that you are really willing to put that effort.
All of these platforms(OGAds, CPAGrip, etc.) like to work with dedicate newbies. Cuz if a newbie joins them and works with them in there initial earning days it's more likely that they will stay to that network for long.
Just don't lie about your traffic sources, don't brag that you can get enough traffic from tier 1 countries if you can't do that.
Always be in contact with your Manager. In fact, just after submitting your profile, get in touch with any of the managers via mail or skype and tell them that you just submitted your profile and if you guys can please approve it asap, cuz I'm all pumped up and ready to start doing my work. This will surely speed up the process for you.
Hope this helps,
GoodLuck Buddy !!!!