No I haven't see those Allie. I'll take a look at those. Airscale seems pretty reasonable cost wise. the mid-range plan is $99 per month which gives 12,000 credits. As far as I can tell a verified email costs 2 credits, you can do other enrichments anywhere from 0.5credits to 3 credits. I'm testing the data to see what I can get out of it with some test credits.
I think it might be a good replacement for other services we use especially because it has the verified email steps built in. I'll add Folk and FullEnrich to my to do list :-)