I think the request to find Reddit specialist, does not necessarily need a spammer. A good quality post attracts interest to the company and that does not mean they will be copy pasting trash. Comment and post upvoting goes hand in hand with a good marketing strategy and quality content
I think that's why they are looking for a specialist, not a multi-account, which would spam everything around. Thus, the project can become popular in a negative sense. If I used such services, I could recommend someone, but I know in this sphere only upvotes.io