I have had poor experiences with Reddit advertising as well, although with similarly small sample sets. My ad ran site-wide for 2 days last December (total $40

I have had poor experiences with Reddit advertising as well, although with similarly small sample sets. My ad ran site-wide for 2 days last December (total $40) and saw 331,901 impressions but only 148 clicks (CTR of 0.044%). Since it was advertising a free app which itself makes money through advertising, each of those clicks (and the far fewer conversions) were worth a lot less than what I paid for them. I bet Reddit advertising works great for expensive physical goods (like watches, Amazon affiliate links, and Not Safe for Wallet links I see advertised a lot) where you can afford to spend a few dollars per conversion in advertising, but it does not seem to be a very good choice for apps.