It is a very good service, no need to trust, you can just subscribe and get yours posts boosted, check the website
It uses steemconnect or you can send yourself the transaction of 1 STEEM to @steembeem with memo subscribe
to get subscribed. While authorizing will allow steembeem to use your vote to boost/contribute help others subscribers posts (steembeem community) which makes you extra SP as posts curation reward shares/revenue!
RE: Ever tried SteemBeem?!