Their site is ugly as heck, but you're not going to find a better deal that $1/gig, at least not in the US. And it's anonymous. And you can pay with Lightning. I have friends paying $60/mo for cell data service. I'm paying like $2/mo tops. I find it to be a real bargain.

silent.link plan doesn't expire - which is great for someone who only needs occasional service due to otherwise near ubiquitous access to wifi.