Is niiiiiceeeeee.... nah, but seriously - Dreamhost won't shut you down for using up your bandwidth (for static usage of course), some high bandwidth hosts may though. That's why I don't know why you should use another ISP for your filedumps
and pretty much everything else with a 'crazy oversold' plan
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A asmallorange.com does offer "ASO extreme" plans (100 GB BW $20, 250 GB BW $40 & 500GB BW $60) for static file hosting. Httpme offers a similar service (100 GB BW $15 & 300 GB BW $35). I do not have personal experience with these companies but in general I have seen positive feedback on both.