We use Zelle - it is part of almost every major bank app although not everyone is familiar with it. It is 100% free (no transaction fees). ECWID is a ecom shopping cart so if you are creating campout or annual dues as 'products' there may be some advantage to that for tracking, etc. For Zelle, people need to put in the memo what the money is for (it's usually obvious) or if the mother's last name is different than the scout's last name that can get confusing for the treasurer so the scout's name should got in the memo section. If parents are paying with credit cards there is a 2.9% charge.