Comment by greendestiny_re

Upwork is worth it if you are willing to make it your full-time job in order to make a profile that will catch the eye of high-quality clients.

The basic job proposal spam you described is designed to keep low-quality clients and freelancers engaged and feeding the platform with money.

Contact me over on Reddit (u/SgtBrutalisk) and I will give you some tips on how to start.