L&P has to be a special breed of dipshit that doesnt understand how things work:
1) A $30 tier patron equals $360 a year for a game that has 2-3 updates a year. In a mobile game, these are what are referred to as your whales.
2) The perks of being in this higher tier are teasers and such. Most (rightfully) consider this not worth the investment, but the whales do.
3) One of the whales posts it to a pirate site (after paying the $30, mind you), where it will get a lot more eyeballs on it, which will hype people up if the teaser was worth a damn, which will translate into some % of people joining up, even if at a lower tier, of which makes up the bulk of any dev's subs.
4) L&P threatens to stop posting teasers to the $30 tier to punish people that did his advertising for him, thus removing value from that higher tier, and in doing so, risking alienating his whales and have them drop their sub.
5) The second order consequence to this, beyond just potentially losing your whales, is that #3 is now no longer true, and given the long time between updates, the only thing keeping 'interest' going is the pirate forum complaining about slow updates.
TL;DR
No more teasers to maintain hype is going to negatively affect subs, even at the lower tier, far more than a teaser getting leaked.