It seems as though these posts only serve to take advantage of this (your) platform by driving traffic to eBay without a clear indication as to what the deal is.
In most cases they just leave users confused as to what the hell the deal/s actually is (or if there are any).
Should vague 'eligible items' posts be banned?
The premise of your question is not quite accurate.
This ebay deal originally was posted without knowing what was eligible a few days previously and was removed per our guidelines thats state that: