Buying hyphenated keyword domains

[Whitey]

Where do you draw the line in terms of the number of domains on the same WHOIS and the number of hyphens in the domain name for ranking purposes?

- assuming that the content is well written and different
- that there is a human / system limit to how many domains can be successfully managed
- minimal interlinking and/or none

I notice that it's a practice that's been around for some time and that the effectiveness is dropping , but just thought I'd see what experiences are out there.

[Webwork]

Perhaps it's a classic case of "if it's working I'm not tellin'" . . but AFAIK the easy-peasy days of getting to the 1-3 spot or the 4-6 spot, including by using multi-keyword-hyphenated-domains, are fading as G increasingly sculpts the SERPs. Throw in social algos, hand-checks, +/-1, brandrank, geo, etc and the free lunch bag keeps getting smaller and smaler.

YMMV.