There could be huge public health benefits worldwide if PMI buys Ruyan or its e-cigarette patents (as PMI has contracts with hundreds of thousands of retailers, and has could place the products alongside Marlboro cigarettes in most favorable store locations). PMI also has badly needed lobbying clout to oppose e-cigarette bans, unwarranted regulations and taxes.
The potential downside is that PMI likely would aggressively litigate against other e-cigarette manufacturers/vendors claiming patent infringement. Unlike Ruyan (which has settled patent infringement cases for relatively small amounts of money), PMI has a lot more lawyers and a lot more money.
It is important to note that PMI does not operate in the US, nor does Ruyan Group, as both operate abroad. Rather PM USA and Ruyan America operate in America.
I've also heard that there's an ongoing struggle between Ruyan Group and Ruyan America (which could be related to the reported negotiations with PMI).
Regarding taxation of e-cigarettes, any effort to impose excise taxes on e-cigarettes provides another opportunity to educate elected officials of the comparable health risks and benefits of cigarettes and e-cigarettes. Smokefree Pennsylvania has been advocating significantly lower excise taxes for smokeless tobacco products than for cigarettes (because similar to e-cigarettes, smokeless tobacco is far far less hazardous than cigarettes). PA is the only state that doesn't tax smokeless tobacco products.
We'd do the same if/when e-cigarettes are regulated as tobacco product, and if/when CTFK, ACS, AHA, ALA would campaign for high taxes on e-cigarettes (as they've been advocating the same tax rate for smokeless tobacco as for cigarettes).