hmm. german site of wyndhamrewards has a smiliar offer.
Mitglieder können innerhalb des Aktionszeitraums vom 2. bis zum 4. anrechnungsfähigen Aufenthalt für maximal 3 Zimmer pro Aufenthalt jeweils 8.000 Wyndham Rewards-Punkte sammeln.
this is pretty clear. From 2. to 4.th 8000 Bonus points per stay.
Great promotion. Just signed up to wyndhamrewards and this promotion and will book 3 or 4 stays as i already requalified for spg plat and won't stay with marriott anymore.