I sell lots of stuff on ebay so I use these shops to make more money on things I have to ship. Buyer pays for shipping so I get reimbursed for the shipping and get paid for the shop. It's a win win for me. You could also post a message on Facebook asking.if any friends need packages shipped and you could run it to the post office for them they pay for the shipping and you get reimbursed. Triples your shop pay and your friend got an errand run.
You should be able to reply to the email you got from the Scheduler for the shop with any questions you have.
It is legitimate but the shopping scout shops at Costco are very time intensive and work out to be a very low hourly pay once you put in 8 hours to finish it.
Also many of them only allow you to complete one of that type so even though you will see many to choose from if you have done one you can't do anymore. I wish they had a filter where you could remove shops you can't qualify for. I did the Purdue one and can never do it again but I see 50 of them regularly when they are published.
In the app go to the "MSP Agreements" section and sign the agreements for every MSP so that you can pick up shops with all the different companies.
Points are just used for increasing your rank which will then allow you to pick up more shops. You can have one more shop than your rank. So if you are rank 2 then you can automatically have up to 3 shops. Don't stress about your points, just keep soing shops and you will slowly advance