That is the correct way.
You are offering something in return for something.
It is a transaction (of sorts).
So why do so many companies ask for your opinions in the form of surveys for nothing!?
What makes it even worse is that they are asking you as customers to give up information (for free) about yourselves.
This information is very likely going to help them get more money from you as a customer.
What also makes this whole non-transaction even worse is that you are giving up your time in which to do it.
Time.
Do you remember that stuff?
The stuff you get a finite amount of but you don’t actually know how much.
And you get nothing for giving them some of this most precious commodity.
If you love doing surveys then that may be enough ‘compensation’ for giving up your time. In most cases, this is not.
At least they should offer something in return.
A voucher, a free gift, free shipping, or entry into a prize draw.
Just something. Anything. For your thoughts.
Even a penny.