Long-term studies and online focus groups

How do you keep track of which survey site you signed up on? Somehow I've managed to get into two well-paying studies. I only remember signing up for one, but I have no clue which site I used. One pays me directly, but the other said they'll add points to whichever survey site people signed up on. Do I just hope for the best? Would the researchers be able to tell me which site it was if nothing shows up in any of my accounts?

Also, am I just super lucky to have two studies? Whatever...I'll take it! Christmas will be here soon.

submitted by /u/lanibear32
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source https://www.reddit.com/r/beermoney/comments/dvm56m/longterm_studies_and_online_focus_groups/