Hmm my company's anti-corruption training material states very explicitly that the only gifts allowed are very minor ones (probably things like company-branded T-shirts or something) and dinners need to be on a modest budget, definitely no paid vacations and the like. Of course, this is just training material which I'm sure they make mandatory primarily to avoid liability, and I'm pretty far removed from the actual sales people in the company. It's entirely possible the training is more what you'd call "guidelines" than actual rules, to paraphrase Hector Barbossa from Pirates of the Caribbean.