Rules and Subfolders

I have a bunch of rules running on my ~/Downloads folder that rename files based on the url they came from, their filename, and sometimes the text contents of the pdf. Currently I have 5 rules that name files from BoA because I have 5 different accounts there (don't ask). What I currently do is I have one rule that moves files from the BoA url to a subfolder under downloads, and then I have rules on that subfolder that identify the account, mangle the name a bit, and then move it to my statement archives. All works perfectly.
I did the above for 2 reasons:
1) It reduces rule clutter in my Downloads folder.
2) Because the rule must match on a partial account number in the text contents, which I think is expensive, I greatly reduce the number of files subjected to this expensive operation.
Is this a good idea, or am I worried about something that doesn't really matter much?
I did the above for 2 reasons:
1) It reduces rule clutter in my Downloads folder.
2) Because the rule must match on a partial account number in the text contents, which I think is expensive, I greatly reduce the number of files subjected to this expensive operation.
Is this a good idea, or am I worried about something that doesn't really matter much?