Day 4 was slow but informative.
I completed the remaining SERP scraping logic and then moved on to implementing proxy rotation. To understand the real cost of free solutions, I decided to test free proxies.
I manually collected around 2000 proxies and wrote a script to validate them. After nearly two hours of testing, only 139 were usable.
This exercise clearly showed why most production systems rely on paid proxy providers.
Lesson learned: free solutions often shift the cost from money to time.
Day 5 will continue from here.
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