Correct the DripOffers capacity figure and tighten the cap

I read campaigns.received_today as a per-day counter and told Marty the
platform delivers about 2,700 clicks a day. It doesn't. That column is
only a daily figure while the nightly cron resets it, and that reset has
stopped running, so the value is an accumulation since it last ran.

The permanent click ledger is unambiguous: roughly 40 to 50 clicks a day
across the whole platform. It also agrees exactly with ordered-minus-
remaining on every campaign, which is a good independent check that the
read-never-derive design is reading the right thing.

So MAX_CLICKS drops from 10,000 to 2,500. At the real volume a 10,000-click
booking would hold the top of the offerwall for most of a year.

The pack-2 placement is working as intended and is already measurable: the
three backfilled campaigns took 14 of the platform's 17 clicks today.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

qa/dripoffers-bridge.mjs

@@ -22,7 +22,7 @@ t('tier 1+2 merges both lists', drip.countriesFor('1,2', tiers) === 'US,CA,GB,BR
 // worldwide would deliver the Tier 1 traffic its owner deliberately excluded
 t('tier 3 alone is skipped, not silently widened', drip.countriesFor('3', tiers) === null, String(drip.countriesFor('3', tiers)));
 
-t('credits convert to clicks one for one', drip.clicksFor(4000) === 4000, String(drip.clicksFor(4000)));
+t('credits convert to clicks one for one', drip.clicksFor(2000) === 2000, String(drip.clicksFor(2000)));
 t('one campaign cannot swallow the platform', drip.clicksFor(500000) === drip.MAX_CLICKS, String(drip.clicksFor(500000)));
 // the offerwall title a stranger actually reads (the platform's floor is 5 characters)
 const T = (c, u) => drip.titleFor(c, u || 'https://www.mailer.gold/x');