I think OP is asking if it is allowed to offer a service where you can buy votes for various internet sites.
For example, if you can vote for which song is the best in a certain country, then he can offer plenty of votes for a certain price to make that song possibly win.
Is this what you mean? If yes, then I do not think much is wrong with this.
Indeed, if this assumption is correct, it's allowed AFAIK (it's a service like many other services, for example, there are plenty of services offering youtube views and such)