It's been a lengthy discussion whether SOTL is going to come on live Potco or not. I'd say, don't expect too much, because it's considered a major overhaul for the entire game. If pirates could buy SOTL, then there have to be comparable enemy ships and so on; the effect will snowball, so it needs to have everything else added to accomodate the capability of purchasing a SOTL. Of course it only makes sense if everything 'big' needs membership. Potco is a business, that's how they make money. Basic and unlimited members both want SOTL, but come on, to actually 'buy', you have to pay on your part (I mean, paying for membership).
And I don't agree with no-limit on sailing level to be able to purchase SOTL. In order to 'purchase' a war frigate Potco needs a certain sailing level. Even more so to control a Ship of The Line. Just a common sense again. If you only want to 'drive' or 'get on' somebody's SOTL then you don't need any certain level or membership. Just like my baby pirates (on a different account); my main pirates let them drive a war frigate at sailing level 1.
