If you just want to do cosplay as a hobby you don’t need to create a Facebook page or a website. That being said – being a self employed artists, a cosplayer, a prop maker, a photographer, an illustrator or in any other creative profession, where you are your own boss and have to make a living – the importance of a effective Social Media presence has become a main influence on our success.
Over the years and with new artist pages every single day, it has become progressively more difficult to get noticed. Facebook artificially limits the reach of fan pages to make ad money, Twitter just isn’t of much value for artists and Instagram only works well on mobile and is slowly turning into a second Facebook (I am 99% sure in a matter of months they will ‘give’ you the option to pay for better reach and ads as well).