Update: I just had this online chat with customer service, and asked them about when/if we would see these networks again. They responded:
"The cost of Regional Sport Networks continues to grow at an alarming pace and this makes each negotiation increasingly more difficult. We no longer have the right to carry the channel now that our deal has expired. We will continue to attempt negotiations with SportsNet New York and are committed to working toward a fair deal.
...
We apologize for the inconvenience. Although SportsNet New York is currently unavailable you can still watch videos of top plays, listen to the games live on mlb.com, and view roughly 15% of the games on WPIX (included in the New York DMA and Superstations package).
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DISH negotiates dozens of contracts every year. Most of these are settled behind the scenes, without event. At this time, we have not been able to come to fair agreements with any of your regional sports networks. DISH continues to offer dozens of Mets games through network television on WPIX CW Ch. 11."
...
We apologize for the inconvenience. Although SportsNet New York is currently unavailable you can still watch videos of top plays, listen to the games live on mlb.com, and view roughly 15% of the games on WPIX (included in the New York DMA and Superstations package).
...
DISH negotiates dozens of contracts every year. Most of these are settled behind the scenes, without event. At this time, we have not been able to come to fair agreements with any of your regional sports networks. DISH continues to offer dozens of Mets games through network television on WPIX CW Ch. 11."