I found this on whirlpool.
Existing customers use https://www.aussiebroadband.com.au/lp/freakinfast/customer
100/20 $89/month (Was $99)
100/40 $89/month (Was $109)
250/25 $99/month (Was $129)
1000/50 $119/month (Was $149)
Due to the recent HFC technology shortages and the potential demand on our call centre, we feel it is important to manage demand and as such, we have decided to put our existing customer Focus on Fast promotions on hold.
If customers decided to upgrade their plans now via MyAussie, the system is ready and will apply the promotion (provided the service is eligible), but we will be holding off our communications of Focus on Fast to existing customers until later this week.
Plans not available at all premises. Only redeemable with an existing active Aussie Broadband nbn™ service.
Current nbn™ plan must be held for a minimum of 3-months prior to the upgrade to be eligible to receive the discount.Customers are eligible to upgrade to any supported plan above/faster than their existing active plan
Update. Thanks to kain0rer
They've scrapped the need for being on the same plan for 3 months, it's now as long as you haven't been on the same plan you're upgrading to in the last 3 months.
Focus on Fast Terms & Conditions
New customers for 100/20, 250/25 and 1000/50 use https://www.aussiebroadband.com.au/lp/freakinfast
100/20 $89/month (Was $99)
FAST10 $10 off for first 6 Months 100/20 plans only (DIRECT MAIL)
250/25 $99/month (Was $129)
1000/50 $119/month (Was $149)
Please note: your promo code fast30 will be applied automatically on the final step of the signup process.
New customers for 100/40 use https://www.aussiebroadband.com.au/nbn-plans/
100/40 $89/month (Was $109)
FAST20 Direct Mail offer $20 off for 6 months (100/40 PLANS ONLY)
Making a killing on the 1000/50 since the wholesale price is the same as all the others