I use and recommend all of these products.
Top Cashback. Easy double/triple/quadruple dips shopping online.
Fuel Rewards. Shell dining/shopping portal. Register your cards and then save up to $0.50/gallon on gas. Gold Status ($0.05/gallon) for using my link.
Robinhood. Free stock trades. Gorgeous app. Get a free share of stock for using my link (randomly selected, up to $200 value).
Door Dash. Restaurant delivery. $10 off + free delivery on 1st order for using my link.