OP is really polite and professional, and this is a real plus point especially if you want to work long term with a service provider. I asked for a review copy and he delivered. The sub I chose was not a small one either. This sub has approx 13-14 million users. I managed to hit the top 20 posts with just 150 (I ordered another 100 votes after he delivered the review votes) upvotes from him. Unfortuntately, my content is ok but doesn't quite fit into the niche, otherwise I'd have gotten even better results.
Redditors are trigger happy and will happily downvote your posts. So use the paid upvotes to negate that, and after you gain enough traction, the tables will turn, and you'll start getting organic upvotes. Make sure your content is decent and you'll be fine.