You need to read the contract/terms of service to determine what you are granting them with regards to your data. You might find that they want to keep an optio

You need to read the contract/terms of service to determine what you are granting them with regards to your data. You might find that they want to keep an option open that you can't accept. You might also find that you are okay with what they propse. This is one of those times when you actually need to read the fine print.