for Youtube TOP rating comments even an IP is virgin and never been used before like a.b.c.d and an ip from a.x.x.x has been used before on TOP rated comments you are not able to get results on youtube with it ... so you have to try a lot of subnets to be able to create accounts and to make top rated comments with it ... so, let's say if you buy from me 100 virgin dedicated proxies, proxies google passed, and ips never been used before on internet, you will be able to get from those ips only 5-10 good for top rated comments ... so i recommend to buy 50-100 dedicated ips from as many subnet b different as the provider can allocate , for that you have to ask the provider to give you as many subnet as they can provide and all proxies has to be virgin dedicated and never been used before, you will have to pay a price a little bit higher for a lot of subnets and thats it, also you will have a higher rate of success with non-US virgin dedicated proxies ...
Good luck !