I mean... every one of those examples involves construction/renovation or directly impacts neighbors. Having guests over in your unchanged house, parking in your designated parking spaces, and just happening to charge money for the experience is a much more reasonable grey area - and doesn't affect tenants much if they hold the guests to the same behavioral standards as the original tenant. If they were just regular roommates/friends, it would be pretty intrusive to ban such behavior, especially if they're not violating maximum occupancy rules. I agree it's a violation in spirit, and many of the above rules get broken anyway, but there's definitely a grey area here that needs a different set of rules.