I haven't heard of them and was unable to retrieve the Google Doc you linked to - can you try to share the info in another way?
I did Google them and while I can't say I'm impressed with their site at all (It looks very thrown together) that's not necessarily proof that they're a scam. It looks like they run a mystery shopping company.
It also looks like their manager director is on the board of directors for a
mystery shopping association in Europe which lends some credibility I'd say.
Do just a little homework on Google and you'll find plenty of information that will help you make a more informed decision about whether or not to proceed with this company.