Create a new campaign, where the source is the segment:
Choose an action called Send email.
Choose to send right away, and select the email you need:
Now we will make a decision to see if the person opened the email:
Choose opens the email:
You can name this decision if you want. But you can also leave it as it is.
Now your path has a YES and NO leg.
Choose the NO and add sending email.
Now you can select how long the decision will be waiting by defining when to send the email:
Now click on the YES leg and add Adjust Contact’s points:
Now define how many points you want to add (or substract):
Good job, your final campaign looks like this: