I don't know if legit, found it advertising on facebook. Domain is pretty new, have 1 month.
I am leaving it here, maybe someone will test, all my transactions are confirmed so I cannot messure if legit or not.

http://confirmationbooster.com

similar to confirmtx, same, lack of info and not in Google(maybe cause it's new)

maybe usefull if they not make lighting network common

what I don't like, it's not connected to blockchain, so looks like it's contact form to people who make acceleration manual