Just a quick question as I approach having 150mil sP. Is the 30 Percent Discount Card a permanent upgrade or does it last 6 hours like the normal 15% discount buff or is it something else?

Permanent, so long as you keep it locked in your inventory. c: It stacks with the 15% discount but not with other discount cards.

All right. Thanks for the info!

For what it's worth, it's probably not going to be worth it to buy the 30% card. The 20% card is only ~34m in user shops (as an aside, I paid around 20m for my card a few years ago. I'm not sure how many exactly, but I have yet to make that 20m back in savings). If my math is right, you're only getting an additional 8% savings (with both the discount card + buff) over the 20% card anyway, because they stack one after another rather than adding together into a 45% discount. The discount for a 20% card + buff is around 32% off, and I'm coming up with 40% off for the 30% + buff.

I do like having the discount card, and I'm making an effort to try and restock enough to pay it off, but I definitely don't recommend the 150m investment unless you restock a ton

that's interesting and thank you! (I didn't even know there was a 20% off card...)

There are 10, 20, and 30 percent cards. The 10% card I don't think I've ever looked up really before, but it's currently 24m in the SS, so at that point you're better off going for the 20% imo if you're going to get one at all. It's not obscenely expensive so for a light/average restocker you've got a better chance of making your money back, even though the discount is a little bit less :)