The phrase "portal bonuses" refers to extra benefits or rewards that can be earned or received through a portal, typically an online platform or website. Full definition
When I see AAdvantage shopping portal bonus offers and bonus offers that come in the mail and email, I will still sometimes take advantage of these. (themilesgenie.com)
These airline portal bonuses usually make it worthwhile shopping through their sites. (dannydealguru.com)
This shopping portal bonus could be a great option for you. (milestothemax.com)