Some points might be:
Lack of merit sources in Altcoin sections?
More spam in Altcoin sections?
Members are ignoring merits or they are too lazy to send merit. Can you research how many bounty hunters sent merits and include number to spreadsheet? I guess you will find out that 90% members who are posting in altcoin section have never sent merits.
Is something wrong with my posts? Am I spamming? I don't see reason why nobody sent me merit while some guys here received 40 merits for couple of topics and posts in meta.
Should I become regular in meta now? Should I write more than it is necessary to write? Should I write essay over half page? Should I send merit to someone if i didn't receive any?
There you go, reasons and small rant. Decide which is which

Nice stats btw.