RevenueHits publisher earnings suddenly tanked, what gives?

hey everyone, hoping someone can shed some light on this weirdness. so, my mid-tier blog, 'TechieBits&Bobs', has been chugging along nicely for about six months now. we get a decent amount of traffic, nothing insane, but enough to make a few bucks. revenuehits has been one of our steady ad partners, nothing spectacular but a consistent trickle of revenue...

...until last week. suddenly, it's like my wallet went on a diet without telling me. publisher earnings have absolutely tanked. we're talking a dramatic drop, like 70-80% down, and our eCPM looks like it's trying to set a new world record for 'lowest number possible'. traffic's stable, impressions are stable, but the money? poof. it's incredibly frustrating, feels like i'm running a charity for ad impressions, honestly.

of course, my first thought was 'what did i break?'. so i went through the usual suspects:

• checked google analytics – traffic volume and quality are right where they should be. no sudden drops, no weird bot spikes.
• ad unit implementation – confirmed, all revenuehits units are active and rendering correctly. no new code, no accidental removals.
• ad impressions – still high, matching our usual traffic. but the revenue per thousand impressions (RPM) or eCPM is just... depressing.
• site-side issues – no new plugins, no major layout changes, no weird scripts running. it's been pretty static for months.
• revenuehits dashboard – scoured it for any alerts, announcements, or notifications. nothing. business as usual, apparently, except for my bank account.

was expecting my usual $X per day, and now i'm seeing $Y. it's like their system is having a laugh. to illustrate, here's a dummy console output showing the trend:

--- RevenueHits Performance Log (Dummy Data) ---
Date       | Impressions | eCPM (USD) | Earnings (USD)
-----------|-------------|------------|---------------
2024-05-01 | 150,000     | 0.85       | 127.50
2024-05-02 | 148,000     | 0.82       | 121.36
2024-05-03 | 152,000     | 0.84       | 127.68
2024-05-04 | 151,000     | 0.83       | 125.33
--- SUDDEN DROP ---
2024-05-05 | 149,000     | 0.21       | 31.29  <-- what even is this?!
2024-05-06 | 153,000     | 0.19       | 29.07
2024-05-07 | 147,000     | 0.22       | 32.34

so, i'm reaching out to the collective wisdom here. has anyone else experienced such a dramatic and sudden drop in revenuehits performance lately? could it be an algorithm change on their end? specific ad type performance suddenly tanking? geo issues impacting certain campaigns? or maybe it's just a sign to start looking hard at alternative ad networks? any insights, theories, or even just commiseration would be hugely appreciated.

anyone faced this before?