Opened Altitude last week. Very much aware that they have very low tolerance for gift card purchases. Is there like a safe limit? Like one $500 visa gc at grocery store per week (with couple of random items so total is not $505.95) to hit the minimum spend requirement for account opening bonus?

I am also planning to buy 5 iPhones with Xfinity mobile online and pay them in full with altitude cc. Total will be around $4000. Is that totally ok or will that be a red flag for a single big purchase? Call CSR and have them online when making the purchase? Does xfinity take apple or samsung pay so I can get 3x?