There are several trains of thought regarding these seeds. Harmful or harmless, there are a lot of them, there are lots of types of seeds, and they're sent from China, often with the parcel saying something else like "Ring" or "gift," etc. The marketing scam theory with ratings is apparently tied to the address that receives it, but it's still vague. Someone will eventually get to the bottom of it. Meanwhile, share a photo if you want but be wise and seal it in a ziplock bag and let your local county or state agriculture office know it has arrived.