Actually $5k is maximum individual cap, the minimum purchase is only 5000 JST (or around $10). but i agree with you, this is full of crap.
Lets do the math, tokensale hardcap is $799,920 : $5000 max individual cap = 159,984 real investor. but none investor are successful to participate. even when the sale are sold out, they are mute their telegram group, lol.
For a minimum purchase, this thread says 50,000 JST or around $ 100 USD, while in the article poloniex the minimum purchase is 5000 JST, which is correct? but I don't think that matters anymore because the sale has ended. and today the JST token will be traded on the poloniex exchange, we see the market's response to this token, how much% justinsun will pump this token.