Basically, This estimates the cost to go .75 MB deep in the chain at the time of the request. Each block usually takes 1mb off the chain, so it's isn't very aggressive and transactions can take some time to confirm. Being not aggressive kind of helps not contribute to unnecessary blockchain bloat.
I think you'll be shocked at the price difference and the speed these estimates confirm!
https://freebitcoins.com/xchange/api/v1/btcfee ({"satsPerVbyte":"102"} at the time of this post)
I really like the idea behind it; it's pretty much what I've been doing manually looking at
Johoe's mempool stats. However, for some reason, it seems to be returning
10 satsPerVByte right now, despite there being 45+ MB of transactions greater than paying
greater than 10 sat/byte.