I’ve noticed this strategy is especially popular in the help desk software industry. Zendesk has done a great job protecting their brand by creating www.zendeskalternative.com. Almost all products in this niche have landing pages like Helpscout or Groove They all have very little competitiveness and can rank well and get indexed pretty fast in Google. Also they bring in highly targeted traffic. But be careful and don’t badmouth your competitor! The content must be unbiased.