429 ALL the time

I just started using NewsBlur, using the ReadKit app. I have it set to check every 30 minutes, and yet I get a 429 error all the time. Is this just par for the course or is there something I should be doing differently. I previously used Inoreader with Readkit and never had any issues like this.

I did search the forum, but it sounds like the 429 is more linked to API usage, which I am not doing. Any suggestions or sharing of similar experiences would be helpful.