I have been using a 3rd party suppliers off and on for the better part of 15 years. Whomever has the lowest price gets my business and when they don't, we switch back to the standard rate or a different supplier. I'm currently locked in until mid-2024 at around 10c/kwh with direct energy. I've never had any issues with early cancel fees or anything else. When the contract is up they tend to automatically renew you into a higher rate (with a couple month's notice) but if you pay attention you can switch again.