Yes, Zyte Smart Proxy Manager(formerly Crawlera) counts redirects as successful requests.
For example: if a user makes a request through Smart Proxy Manager to http://mysite.com and the response is
302 Found with a location, header to follow https://mysite.com, and the crawler follows that link through the Smart Proxy Manager account, it will get accounted for two requests.
Smart Proxy Manager does not follow redirects by itself, it only executes a single HTTP request, returning its HTTP response. So, if a 3XX response is received, the crawler should decide whether to follow it or not.
Note that if you're getting many 3XX redirects, you may be able to optimize your spider code to save Smart Proxy Manager requests and make the crawl more efficient.