For those reasons we chose to offer a rotating selection of 3 tier 10 rental ships, to allow more players access to the mode. We do not believe allowing this is somehow disrespectful to our community, as it's hard to see these ships as a reward due to their temporary nature. They don't give you any bonuses nor are they exactly as good as the ships that you normally unlock - they cannot equip camouflages and can only participate in Clan Battles. Essentially they give you just a taste of the ship, but to really master them you'll need to unlock them yourself. In this case they are meant to be a tool for us to ensure access to the mode for the majority of the current audience.