Subscriber growth is harder to track than the other metrics. Only the current subscriber count is displayed for a particular subreddit, and historical data cannot be rebuilt retrospectively as subscribers do not have a visible historical imprint. A third-party website, RedditMetrics (http://redditmetrics.com/), has been retrieving and storing real-time subscriber counts; however their data on the particular subreddits of interest only reaches back to 2012 so the subscriber growth analysis can only start at this point. Fig 2 shows the three social media metric time series for each cryptocurrency; note that subscriber growth is the only metric that can have negative associated values, caused by more users unsubscribing than subscribing on a particular day.
Additionally, there are a few ways in which customers can reduce the amount of fees they pay. If customers choose to pay trading fees with Binance’s native token, BNB, the fees will be reduced by 25%. The second way in which fees can be reduced is by referring friends to Binance. If a user pays fees with BNB and refers a friend, the most they will end up paying in trading fees is 0.06% for each trade. That is one of the best deals in all of crypto.

DeFi stands for decentralised finance token. They are very complex but essentially aim to disrupt the finance world to enable people to follow and lend in peer-to-peer networks, without needing a bank.
More broadly, the U.S. has been slow to issue regulatory guidance for cryptocurrency businesses. The industry has generally appreciated regulators' care and caution to avoid hampering innovation or overregulating something so misunderstood, but the lack of clarity has also become restrictive for many looking to operate, develop, and grow their products and services. But Zhao appears to be undaunted by that.