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I’ve seen this commented on threads such as
You are searching too quickly. Reduce search 90 seconds limit?.
This has to do with your current Activity (not Rank), and the response time improves noticeably as this parameter increases. Below is the algorithm being used (second quote). Although it is often refered to in a posting context, it also applies to a search context.
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Q: Why do I get the "The last posting from your IP was less than 360 seconds ago." error when I haven't posted today?A: Logging in, sending PMs,
searching via the forum's built in search engine and reporting posts to a moderator will also be counted as posting and extend this limit back to 360 seconds. Don't worry: as your activity increases, the 360 second limit will decrease as well. Here you can see the algorithm how the posting limit is calculated based on your activity:
https://bitcointalksearch.org/topic/m.4131557<…>
In general terms, the waiting time improves as you gain activity:
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waittime = 360;
if(activity >= 15)
waittime = (int)(90 - activity);
if(activity >= 60)
waittime=(int)(34.7586 - (0.0793103 * activity));
if(activity >= 100)
waittime = max((int)(14-(activity/50)), 4);
I've seen mods/admins can whitelist an account to reduce posting limitations on a case by case basis. I’d presume search timeframe limitations would also be reduced as per the above.
Not sure if Copper Membership does the trick too. This would point to a possible 75% reduction in
search time cool down periods (assuming it plays the same game as
posting time reduction):
Newbies can now pay a small fee to enable images – I can’t attest to it though.