I maintain over 9 servers for different purpose on Lisk for a year. With all other fees included I took about 4500$ out of my pocket just for that. I also have passed over 1500 hours in the lasts year for multiples things. Stuff like what was metionned earlier and a lot more (alpha test, guides, snapshots servers, alternate explorer, etc) If you count just 10$ per hour, this would mean 15 000$.
You really have no idea whats it can represent to be a good delegate with your "it' only a 50$ a year server"
By the way. a 5$ server a month is the cheaper you can get for entry level vps. This is 1 cpu, 512 mb ram, limited bandwidth, bad latency, no ddos protection, etc. This isn't even enough to run a single low quality server for lisk...
Drop mic...