Except the buy american sections of the stimulus have been largely striped out so large companies have the resources to get around it. The difference in the supply chains between small and large ISPs. A large ISP can easily purchase their products directly from a wholesaler in another country. While a smaller ISP has to go through local retailers. While this does produce higher prices it employees more people at higher wages and results in greater tax revenue through sales tax.
There's a problem with "Buy American" though: only a few brands of networking euqipment (Zhone for examle) are totally US-based. Ubiquiti has their stuff made overseas, and they're big in the wireless department...
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