Just wanted to add that ClubMom is offering 1,000 points for you to actually attend the workshop. I think you have to register through their link, then when you attend they give you a slip of paper with a code on it to enter online to get your points.
50 MyPoints is only worth about 38 cents, while 1,000 ClubMom points is worth $5. I guess you just have to ask yourself whether it'd be worth it for you to go to a one hour class at Home Depot for $5. If you're interested in making a major purchase there, you might want to know that attendees at these workshops receive a 10% off coupon good on a future purchase. If you don't want to attend, getting 38 cents through MyPoints to sign up and NOT attend isn't a bad deal!