[tgtweak]

I ran about 8TB on my fiber in one month, and no ISP notices to speak of. That's only ~25mbps sustained. You could easily push 500+TB on a 25gbps connection if you were doing something naughty with it, and I'm sure you'd hear from them about it if you did!

[aidenn0]

I used 2TB on my cable modem once and got called with them trying to upsell me to Unlimited data for $75/mo more.

[xur17]

I regularly use 5 - 10 TB on my fiber each month, and have never been contacted.