Using blocktrades only benefits the Steem price if people are converting from other crypto like bitcoin, however if users are paying in Steem which they already have then it makes no difference to the Steem price. We will be integrating blocktrades soon so you can pay in crypto with us too.
The added advantage of leasing with us helps to create investor opportunities for external and existing community investors to buy more Steem to delegate to our users and get a return better than most masternode opportunities, creating an investor-class method of holding Steem.