Subscription only covers 10 SFX? Really?

I need almost 30 $2-$5 SFX for a current video. I am illustrating a poem in a whiteboard style. I only do a couple of videos a year. Does a subscription really only cover 10 items? I have to pay a la carte for anything over that? I do not even need music or footage. I might as well just pay a la carte for everything right? I already made one tiny purchase, so will a coupon code for the first purchase work if I have never used a coupon code before?