For purchase of Canon DSLR...there will be pwp for either the 55-250mm or the 50mm lens.Usually this 2 lens would be featured(pwp),other than that,i am not really sure what kind of product will be on promotion this time round.
If it advertise in official canon web, it should have. Normally can get it from shop on the spot. Check canon website on the promotion page what the available promo and what the min standard free gift u will be getting from Canon.
Saw on paper sometime ago canon 7D & 5Dmk2 have PWP on certain L-lens. Not sure still available now.
Last time when I bought my 7D around a year+ ago, there a pwp for 580EX2 & battery grip. Got those 2 on the spot at shop. Didn't get the lens which is the 55-250mm as I already had it at that time. Registered warranty online (can do it on spot at canon center) & can get 50mm f1.8 at discount price at there time when I went to collect the standard free gifts.
Did saw Nikon have pwp sometime on paper, but think quite seldom compare to Canon. Or maybe didn't notice when there any.