My computer generate 5 digit vanity addresses in 10 seconds even with CPU only... So we don't need your service to generate.
For "free" because they keep private keys instead of split-keying them.
This^^
They have tons of scam reports. Don't trust them.
Fortunately, I don't use any of the address they've made for me... I never user vanity bitcoin addresses because I simply don't need and vanity things 
For "free" because they keep private keys instead of split-keying them.
This^^
They have tons of scam reports. Don't trust them.