Yes, backlink services can help a blog rank better, but it really depends on the quality. If the links are coming from real, relevant websites and built naturally, they usually give good results and improve authority.
But the problem is many backlink services sell cheap spam links like PBNs, profiles, comments, or bulk links, and those can be risky because Google can detect unnatural link patterns. In most cases, low-quality backlinks may boost rankings for a short time, but later they can damage your site.
So overall, backlinks work, but only when they’re high-quality and done the right way.