If they don't explicitly say in the ToS that they aren't going to use it in any particular way, then you can be sure that they are if there is potential for com

If they don't explicitly say in the ToS that they aren't going to use it in any particular way, then you can be sure that they are if there is potential for commercial gain. Even if they do explicitly say that they aren't going to use it, I'm going to be sceptical. There will be a nice pile of caveats and exclusions within the legalese, and if not they might just use it anyway and hope they can afford to ride out any resulting legal action if people notice.