I've done a fair amount of searching and can't find a straight answer anywhere.
The free tiers on most of what I've tried are basically useless. You get just enough to see that real people are there, then hit a wall the second you try to actually message anyone.
I've tried a few different things already with mixed results. Some were complete time wasters, others were okay but nothing that really clicked.
Any input is appreciated, whether it's positive or a warning. Both are useful at this point.