Unfortunately only Staff members can receive SB Points. In the past it was possible to donate to everyone, but since users exploited this method to create fake accounts to farm more SB Points to then send to their primary account, this feature has been permanently removed.
As you can see by looking at staff posts, staff members who decided to accept SB Points from users have a link in their signature like the following picture:
And the part "clicking here if you want" is actually a link which redirects you to a simple form to decide how much to donate to the staff and to add any optional messages.