Not all of them, some just want to sell stuff, but make it positively terrible to search for things. Some site owners provide you service, like banks, or chat s

Not all of them, some just want to sell stuff, but make it positively terrible to search for things. Some site owners provide you service, like banks, or chat services like Slack, or Jira, but the user interface is again a turd. Some just publish info on a blog, but you can expect it to go away, so why not save it for later. Slack limits the amount of searchable messages to 10k, so if you save them regularly to local DB, you can search without limits. All kinds of owners don't sell/show ads, or care about scraping.