The best replacement for offers is groupon.

The best alternatives to offers are rated as following:
★★★★★  groupon
★★★★  offer
★★★  vouchers
★★  promotions
★★  offer's
★★  surveys
★★  deals
★★  non offers
★★  without special offers
★  referrals
★  kindle without
★  mergers
  double offer
  written offers

Your alternative for offers is not listed? Suggest!
Speaking about offers, one probably shouldn't forget about surveys.

Other search terms related to offers and their ratings are:
★★★★★ surveys
★ ipod touch
★ free gifts
★ laptops
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Google Trends

Scale is based on the average worldwide traffic of offers in all years. Click on graph for more.
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