About 3 years ago, Hoover offered 2 free flights in return for spending £100 on one of their products. They had no idea how many people would take up the offer, and it ended up costing them £48m.

Read the BBC story

2 years ago, the Daily Express offered a cruise for £10. Again, it was massively oversubscribed, and many people were disappointed.

View the report on BBC’s Working Lunch programme

And last year Threshers’ email discount backfired on them.

I wrote about it here.

Remember, if something seems too good to be true, it probably is.

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