As I mentioned above, the below could possibly work just as well, with the active link showing the sources of all the available options, thereby adding only 2 words to the overall letter.
...processing service called Bit-Pay (
among others) will convert...
~Bruno~
EDIT:
...processing service, e.g. Bit-Pay (among others), will convert... In my haste I must have overlooked that. It will certanly do what we need it to do then.
Cheers
As I mentioned it earlier, possibly no need to do it with the first emailing, for the link would first have to be set up and relative.
To start that process, I need
ALL the names of the entities that current offer this processing service.
~Bruno~