I've been looking into this for quite a bit too. For the posts to stick either use your own account (as long as it has some engagement) and outsource the upvotes or hire a VA to do the posting for you, but again let me warm up the account first. At least this is the conclusion I came to - if you hire posers, the chances are their posts will be deleted in a few days since they use their accounts to drop links left and right.