This is just an example of some of the merchants that accept steem.
Also you can buy stuff with steem via coinpayments.net. If you look at their steem wallet you can see that there is activity on it https://steemitwallet.com/@coinpayments.net/transfers.
By dollar value bitcoin moves more volume than any other crypto but if you compare by the number of onchain transactions steem has double the volume. In fact according to https://blocktivity.info/ there 11 blockchains that process more operations than bitcoin.
I agree that the number of accounts is irrelevant, more important is how many people are using the blockchain and BTC is lagging behind in actual usage.
RE: Top Five Reasons Why Steem is the Blockchain of the Future