Over the years I've seen only a small fraction of hosting-related ads on Facebook. That's considering my profile had some very specific keywords related to the industry. There has got to be a reason why that is. I came to the conclusion that running general web hosting ads on Facebook is a waste of money, unless you can come up with very specific campaigns. For example, if you build landing pages for specific cities and aim small business owners in those cities specifically. Or, if you come up with a related product SMBs might need and try to reach out to them.