Results so far, I just seen a spam mail from an eBay vendor, not one who I bough something from so I suppose eBay give the address, one from an Amazon Marketplace vendor from who I bough something from, few from few supermarkets that have asked for a mail for the fidelity card. I do not active monitor my SPAM folder so those are just messages who defeat my antispam, can't really tell reliable stats about all spam.
So far the overall arch works, in the sense that I do have a bunch of temporary address of "quick" usages (for instance on the go) and not much stress creating and deleting aliases but using mobile crap and very little number of services compared to the mean of people I know it's hard to say if it work or not. Surely works well for easy sorting messages (autorefile via MailDrop), and that's a good thing for me anyway.