@madmartyk Hello, I would be happy to answer your questions!
Well as for having the COIN app open at work or at home, you will only be mining the same squares over and over; now that is not a bad thing, you will still receive tokens from these, but if you are stationary, then the COIN app has to wait about 4 minutes for the square to be mineable again. So yes overnight and at work may rack you up about one hundred extra coins a day, maybe a little more. However, there is one downside to this if you have a phone with an AMOLED display, which most modern smartphones have. AMOLED displays when left on the same screen for a long time, have a tendency to experience what is called Burn-In. This is the same type of burn in that older TV’s would experience couple years back. Burn-In can leave a permanent image stuck on your phone screen, and the only way to fix it, is to replace the screen. There are apps that claim to fix it, and yes they kinda do fix it, if you don’t mind damaging the rest of your screen. What they do is, flash colors at maximum brightness for hours or days, which in turn lowers the quality/intensity of all the pixels around the damaged pixels from the original Burn-In, which then makes the Burn-In harder to see. But this is also lowering the quality of your screen. So if you are going to keep it open all night and all day, I recommend turning the auto-brightness off, and bringing the level of brightness all the way down as low as it can go, this will lower the chance of Burn-In occurring, or just use a crappier phone that you don’t really care risking the Burn-In.
The kit took a couple weeks for me to get after purchasing, but it was well worth the wait!
Having more sentinels does not give you more coins on your COIN app while mining. However, you can hand one or two out to other people who may want to mine coins for you. That can be done in one way, each person must use their own login for the COIN app, just like you are doing now for your account, but then they have the choice when they reach 10K coins to deposit them in any crypto wallet, so if they are willing, you can give them your crypto wallet address, and add them to your stash of coins. Don’t use your login on someone else’s phone running the app at the same time, this is considered spoofing, and they will cancel your account, and take your coins.
And yes the more squares you can drive or walk over, the more coins you will mine. Sitting in one place makes the COIN app wait about 3 or 4 minutes until that same square is mineable again. But if your driving or walking, every time you are over a new square, as soon as the app finishes mining one square it will move onto the next, its about 15 to 20 seconds at the most. So you will earn many more coins by driving then staying in one place.
Hope this helps, feel free to ask me anything else you may be wondering!