You're complaing of getting discount?
No, I'd guess the OP is complaining about repeatedly being bombarded with adverts for what turns out to be the same, not particularly generous, offer. Did you read his post?
Their offers last year were better*, and the fact voucher codes and offers from CRC are getting thinner on the ground and of less value suggests they are doing just fine, as Messiah says just competing with Wiggle for brand awareness on the build up to Xmas.
*£50 off your next order over £100?! Munqe chick bought a lovely Kona road frame with carbon forks for just over £100, got the voucher, and then got fulcrum racing 7 wheels after the voucher for £90. Not holding my breath for similar offers this year, any recessionary effects been offset by the explosion in cycling from this summer I reckon.