You sound like a paid person to promote this site
Judging by the fact that this account(
https://bitcointalk.org/index.php?action=profile;u=1759334) hasn't posted in 3 years prior to his vouch you're probably correct.
But, correct if me I'm wrong, aren't you doing literally the same exact thing you're accusing the other dude of doing but with rollbit?
They are promoting in different way. The guy that promoting this scam service is shilling, vouching and misleading people to use this service while nakamura is just wearing the signature banner of rollbit without saying any promotion word or vouching for the signature banner that he is promoting. Technically they are both promoting but in a different manner. The main issue here is the reputation of the project being promoted and the way he is vouching for this malicious project.