Hi, links inside an email are just links, i don’t know why you have such a message. Never seen a warning like that and I don’t know how to reproduce it. Have you a gmail extension active, a popup blocker, a chrome extension or like?
When you resubscribe, what is happening? Have you enabled the repeated subscription on subscription config panel?
If you are good at selling and using different products then u can do it to earn money also Here is a guide on earn money “earn for testing products” which I would suggest you to check.