How would the Devils prevent Rangers fans from buying ticlets? Turning away Blue jerseys? There's no other way. The pricing is the pricing, Devils fans can buy them just as much as Rangers fans can.
What the Devils could have done is allowed partial plan holders (and others who bought a # of individual games, as they had that data) the opportunity to purchase strips at a reasonable price above full sths, but below "market" (for Rangers as an opponent. More than fair in exchange for multi-round commitment. Instead, they allowed full sths to purchase additional strips (by this time, a Rangers matchup looked very likely) at a cost that is a fraction of what the team is asking for individual games. That's why the Ticketmaster map (as of yesterday) showed probably 75% of available seats being verified resale (most of these were put up even before the public sale).
So someone who had even a single season ticket could buy up to FOUR more seats (albeit committing to every game). Many (most?) of those extras are now up for resale. At the sth pricing for the first round, that person could probably pay for most of their season by selling the additional ones.
Basically, the Devils took (very good) care of full sths ... screwed partial plan holders ... and is gouging them (and everyone else). In the free-for-all of the secondary market, the Rangers have: a) more fans; b) probably a wealthier fan base; and c) a fan base that is used to paying these kids of prices (and would have to pay much more to get into MSG).
The Devils know this ... they don't care. Should they? In the short run, maybe not, as this will maximize their playoff revenue this year. Should they have left some money on the table to get more Devils fans in the building for home-ice advantage? Maybe, but unlike the prior owner (and I am not suggesting that the prior owner was better, overall, for the franchise), they are not fans first (or maybe at all).
However, they may have made a big mistake going forward. I am not sure why anyone would ever buy a partial plan again ... maybe this tactic bullies some into becoming full sths ... but I think they lose more than they gain, and those folks will probably just go to secondary market for their ticket needs next year.
The 20 sellouts this year was a mirage. A significant # of tickets were comped to full season ticket holders through their renewal perks and the rewards program. i probably had far fewer points than some, and I ended up with 20-something free tickets, including Club seats for at least 3 games.