Will Narayana accept this action? I ask you for "subscription" for the preservation of Vedas. I ask for money for gopuram construction. Daily I receive "biksha" from you.
All this is taking from you in the form of "dravya" . I also ask for physical labour. I ask for collection of rice from door to door for distribution. I ask for distribution of prasad from hospital to hospital. I ask for a pond to be dug for water for the cattle.
Like this, everyday, I ask you for money or labour. How will it be fair, if I say I have nothing to do with you when you perform namaskara to me? If, because of that, I give you my blessing for your namaskara, will it actually do some good to you?
Does my blessing have that power? People who are in constant communion with Paramatma have the true power of penance only can impart such power to their blessing. In the case of others, it can only have a small power to do good in the sense that all good thoughts have some power of doing good.
The amusing side of this is that the one who has cut off all connections with the outside and is immersed in his sadhana of Atma marga, acquires the power of Asirvada.
Grace, Anugraha, by virtue of his dedication to his sadhana and the (spiritual) experiences he gets in that process. Such power comes naturally to him. Even without his knowing and intending, his Asirvadam reaches the person doing namaskara to him and does good. It is like a fully ripe fruit bursting and pouring its juice in the mouth of anyone who opens his mouth below it.