Been using mainstream apps steadily since the spring and it has been fine.
Everything about mainstream apps hinged on how many people within reach were active that week in the end.
The variable nobody controls for with mainstream apps is how far you're willing to travel.
Two people can have opposite experiences of mainstream apps purely because of the time of year.
One thing I would do differently with mainstream apps — set your radius tight first and widen it only if it goes quiet.
Results with mainstream apps depend enormously on how dense your area is.
Practical tip for mainstream apps: test it on a weekday evening, not a Sunday morning.
Take that as one data point on tried the lucky date app for finding random matches, not gospel.
If none of the above works for you, Flamedate is another free one people here mention a lot.