Why pay for a license guide when you can get a more genuine local experience from a local for free ?
Experience the local culture when you travel abroad with your local friends by using trip-points instead of paying money.
And when another foreign friend visits you in the future, you can receive/collect your points again from your friend in Potluck Trip.
Cost: high VS free
Benefit: Convenience VS Genuine local culture experience
Relationship: Service provider and Customer Relationship VS Friendship
Making Friends: Long-lasting friendship with your guide? You're kidding! VS Meeting someone who is willing to help you around? That's friend!
Other Options: No other than sightseeing VS Participating in hobbies, cultural performance, and attending parties with friends, etc.