In the last round of systemwide hotel promotions, between January 16 and April 15, members of the programs of Marriott, Ritz-Carlton, and Starwood were all offered the same bonus: a rather modest double points for the first three stays at participating hotels.

No great mystery behind the identical offers. With last year’s acquisition of Starwood by Marriott, all three hotel groups are now owned by Marriott.

For their summer promotions, however, all three groups have different offers. Here’s Marriott’s.

Offer Details

Between May 27 and September 4, Marriott Rewards members can earn 2,000 bonus points for the second and subsequent stays, plus an additional 2,000 bonus points for each of Marriott’s different brands.

Registration is required, and must be completed by August 30.

Deal or No Deal

Marriott Rewards points are worth around 0.7 cents each, so earning the full 4,000 points would be worth $28. If that bonus were earned for a single-night stay costing $125, it would amount to a 22 percent rebate. Not bad.

The 2,000-point stay bonus alone, minus the brand bonus, would be just half that — a much less enticing proposition. And it’s only awarded after the second stay.

After 20 years working in the travel industry, and almost that long writing about it, Tim Winship knows a thing or two about travel. Follow him on Twitter @twinship.

This article first appeared on SmarterTravel.com, where Tim is Editor-at-Large.