Being contacted after survey?

I took a survey earlier (sampilicious), where it asked me if I can be contacted for a group interview-survey type thing and I was afraid if I said no, I would not have received credit for all the time I put into the survey. It gave me two options of when to get online for the group survey and I chose one. It also said if I completed it, I would be credited $30 in either a gift card of through SR credit.

Is this okay to do or is this against SR policy? I don't want to do anything to get my account suspended or go against the rules. I really love SR :love:

TIA!

Bumping

Can anyone help me?