It was an advantage financially, vs the alternative which was to sell out along with Mike and Jesse (who “only” received a handful of millions of dollars). He didn’t HAVE the alternative of running the drug empire with Mike and Jesse, because they both decided they wanted out. And bear in mind, that was 80 million dollars after only using up a fraction of the methlamine. If he had stayed in it, he could have amassed hundreds of millions of dollars. Which would have been useless to him, since he could never, ever have spent all of it.
