A better way to realize the number of group purchase products? What to do with it

A better way to realize the number of group purchase products?
Buy goods, group purchase is generally false data bar, how to deal with it better?
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Write a crontab to automatically add m~n per minute.
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Where's the fake?
I mean, you set M-minutes to add N, not directly +n.
But in M minutes, no n/m increases by 1.
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When 1 subscribers are ordered;
Quantity = quantity + rand (2,5);
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Insert data into the order form at regular intervals.


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When the data is added, the number of participants is randomly 1-499, the actual group is +1 on the base.

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