I believe it was Ian Flynn, the new writer of the comics, who saids he supports Sonamy because he believes its would be a cute crime fighting couple. He also saids he can't write any Sonamy stories because of a dumb mandate SEGA made.
It is a very sweet scene of Sonic and Amy, I agree. Though at the same time, as much of a Sonamy fan as I am, I know that Sonic would do the same thing for all of his friends. It shows that Sonic cares for Amy as a friend.