A 5 minute update check interval is usage-reporting in disguise. Way fewer people would turn off a setting labeled “check for updates” than one labeled “report usage statistics”.
Eh, this one is probably ignorance over malice. It's super common to see people who need to make an arbitrary interval choice go with 300 out of habit.
Screen Studio can collect basic usage data to help us improve the app, but you can opt out of it during the first launch. You can also opt out at any time in the app settings.
In fact, assume the opposite unless you have a reason to assume otherwise (aka a close personal relationship). Giving strangers/businesses that you have no connection to the benefit of the doubt when they harm you is a good way to get taken advantage of.
Never contort your reasoning to attribute to incompetence what is much better explained by malice. Especially when politics or money is involved, malice should be the assumed default.