I’ve been thinking about using these sites for my app. I’ve looked a long list of these sites [1]. Many of them are pay to play period, with minimum campaigns in the hundreds of dollars, which to me isn’t viable to be able to just tap my toe into the water to see the effectiveness of the site.
For now, I’m sitting out getting listed on these sites. In fact, I do not want my app listed on them because some of them have better SEO than me, so it’s feasible that for certain keywords (brand name, or very closet to it), they will come up ahead of me and then I have to pay them just to get my own traffic back.
[1] Short list of ones I looked into include TrustRadius, Software Advice, BestVendor, FindTheBest, AppAppeal, Cloudswave, GetApp, Alternativeto, SocialCompare, IT Central Station, G2 Crowd, TopAlternatives and DiscoverCloud.