The issue I ran into in the past with sites like spamgourmet is once they get moderately known, other sites start blocking the use of their addresses (that is, Zorflab.whatever will refuse to let users put in a @spamgourmet.com address).

A workaround is to use a domain you own and either point it at one of those services or set up a catch-all address with your e-mail provider. I do the latter. I have @subdomain.adomainiown.example configured at FastMail with * delivered to a folder in my main e-mail account. As a nice bonus, I can also send messages with [email protected] as the From address when needed.

Since it is a domain I own and no one else uses it, no services will likely stop me from using it. And since it's a subdomain, it's not easy to discover so spammers can't indiscriminately blast away at [email protected].