The Campaign For Real Ale (Camra) has seen its membership rise by more than 2,600 following a joint promotion with JD Wether-spoon (JDW).
Anyone who signed up for Camra membership on forms at JDW pubs received vouchers worth £20 off first-year subscriptions.
The "pay back" was returned in the form of 50p vouchers, which drinkers could redeem against the cost of real ales at Wetherspoon pubs.
Vouchers were "rationed" in four different sheets covering each quarter of the year in order to prevent customers from cashing them all in at once.
The scheme began last April and was publicised in JDW pubs and publications and on the company website.
"It's been a fantastic success and was replicated at various beer festivals where drinkers took up the offer enthusiastically," said Camra spokesman Tony Jerome.
JD Wetherspoon's latest beer festival, from 27 March to 14 April, was billed as the largest the world has ever seen. Fifty cask-conditioned beers were on offer.
Currently 131 Wetherspoon pubs are listed in Camra's Good Beer Guide.