I don't see a problem promoting something you are really excited about more than one time. Daily tasks are a bit on the extreme side though and the restrictions to join aswell. Really wonder how many people have perseverance to go through this.
And you have so many social media and other channels to use. Just drop a link each day to different site and you are in.
You need to post your referral link to any one of the social media site and you are in.