I have a question about offers

I know many of you complete offers in return for money: like installing a game and reaching x level before z day. So my question is, How does (example:) swagbucks know that you installed the game and reached the level in this amount of days. Is there like a verification process?

submitted by /u/Weary_Lunch_3057
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source https://www.reddit.com/r/beermoney/comments/kqeu2f/i_have_a_question_about_offers/