So a missunderstanding then I read it as:
If you want to meet people don't use Tinder, [not using twitter] used to work well in the past, it very rarely works now.
If you want to meet people don't use Tinder, [not using twitter] used to work well in the past, it very rarely works now.
"If you >don't< want to meet people don't use Tinder"
the way it's phrased means (unambiguously) that Tinder sucks, and Tinder doesn't work