Is it a lack of coverage or just strategically staying under the radar?

I think the lopsided press coverage of VC-backed vs. bootstrapped makes sense when you think about the incentives: VCs are focused on liquidity events (acquisition, IPO), so their startups might aim to be in the tech press and divulge details about revenue, growth, etc in an effort to pump up their valuations.

If you run a profitable bootstrapped company and you are reaching your customers, why speak to the tech press and discuss your financials? It would attract competition and I can't think of any upside.