Some points to consider:
1) WU, MG, and Ria are still available with a $300 min on the basicstero site; however, you are taking on those potential inconveniences that these regulated methods now carry and a source has no power to force WU etc to change or cooperate (clearly the source would also prefer to get you money without issues).
2) WU, MG etc also have fees -- much higher than cryptocurrencies.
3) A source (any source) has no control over Western Union and/or banks' ongoing and evolving restrictions and regulations.
This is one of the reasons cryptocurrency was developed -- because people had a demand for an alternative to the centrally controlled traditional methods (not just for buying things we are interested in but in general across the broadest of scopes).
4) There are way to use coinbase, for example, and have virtually zero fees or very little fees which are much less than WU costs. (use one of the bank transfer methods to pre-load you account with a $USD balance ahead of time and then buy crypto when needed -- or on an exchange using a limit order and being a market maker as opposed to a taker -- Zero fee, totally free, with this later method).