It may be a joke, but it's a pro-landlord joke. /r/loveforlandlords are pro-landlord, in reaction to /r/landlordlove, which is the anti-landlord subreddit.

Omg Of course not. Gotcha! But actually, I seriously could, cause I'm dumb and because I expect right wingers to always surpass my previous view of their depravity. Some people are saying this is a serious sub made as a response to an ironic one called landlordlove. Looking at it now, it does seem be totally ironic.