I sort of view this like paying those services to get more YouTube subscribers. Yeah you may be able to get some automated service to make your stats look better and maybe it will even make you get Partner. But if you don't have the engagement, then what's the point of having the subscribers? I'd rather have 1,000 people like my page who are genuinely interested instead of 10,000 people who were paid and aren't targeted. Just my 2 cents.