The entire economy of the game is based around players spending money to purchase in-game assets. That's what drives value to the SPS token. Releasing new card sets has been the primary method of driving revenue across every trading card game I've ever seen. As an example, Magic the Gathering (probably the most successful TCG of all time) releases at least four full new card sets with hundreds of cards each every year.

The difference between Splinterlands and most other trading card games (or any type of game really) is that when people spend money in Splinterlands the value goes to the SPS token, and therefore all of the token holders, rather than all going to the company.

On top of that, Splinterlands is working on some really innovative solutions to ensure that older cards retain value and utility as we continue to release new ones (though I know they are taking a frustratingly long time to materialize), which is another way I think Splinterlands is ahead of the competition.

So as an SPS token holder, I absolutely support releasing a new set of cards at least once a year or so to continue to drive value to the token. We will see if a super-majority of staked SPS token holders agree.