But to OPs point, their incentives are not aligned with advertising. Cloudflare is not incentivized to sell user data or misuse data for targeted ads or mining

But to OPs point, their incentives are not aligned with advertising. Cloudflare is not incentivized to sell user data or misuse data for targeted ads or mining data. If they start selling data they gather as a result of their product they will burn user trust and goodwill in a single day and seriously harm their business and brand. So they would never do it intentionally.