There are a few relatively easy ways to achieve that.
Best option:
1.) Create a new preset and make it the master preset.
2.) Leave the preset you want to copy from activated (but not as master)
3.) Cmd+c and cmd+v (it will always copy, but pasting is always done into the master preset).
4.) Export your new master preset and upload it to the forum/ share.folivora.ai
Second best option:
On share.folivora.ai you can select the Insert JSON option. There you can easily paste triggers you have copied from BTT.
To insert more than one you can just insert them into a JSON array like this:
[
{
"BTTTriggerType" : 112,
"BTTTriggerTypeDescription" : "3 Finger Click",
"BTTTriggerClass" : "BTTTriggerTypeTouchpadAll",
"BTTPredefinedActionType" : 251,
"BTTPredefinedActionName" : "Custom Move\/Resize Window",
"BTTActionMoveResizeConfig" : "{\"BTTOriginToUse\":0,\"BTTChangeYOrigin\":1,\"BTTNewYAbsolute\":0,\"BTTActiveOrHoveredWindow\":0,\"BTTSpecificScreenFrame\":\"{{1680, -164}, {2560, 1440}}\",\"BTTNewXRelative\":0,\"BTTOriginDisplay\":0,\"BTTChangeXOriginRelative\":0,\"BTTNewXAbsolute\":0,\"BTTChangeXOrigin\":1,\"BTTChangeYOriginRelative\":0,\"BTTUseVisibleFrame\":false,\"BTTScreenOrigin\":0,\"BTTNewYRelative\":0,\"BTTDirectionToMove\":0,\"BTTScreensToMove\":-2}",
"BTTActionMoveResizeName" : "test",
"BTTEnabled2" : 1,
"BTTUUID" : "C95B1BCC-7127-47A5-A858-6F113F328A3E",
"BTTEnabled" : 1,
"BTTOrder" : 0,
"BTTIconData" : "",
"BTTAlternateIconData" : ""
},
{
"BTTTriggerType" : 110,
"BTTTriggerTypeDescription" : "4 Finger Tap",
"BTTTriggerClass" : "BTTTriggerTypeTouchpadAll",
"BTTPredefinedActionType" : 5,
"BTTPredefinedActionName" : "Mission Control",
"BTTEnabled2" : 1,
"BTTUUID" : "0D6CBC82-45E5-4569-B8EE-F85A3F82DA5C",
"BTTEnabled" : 1,
"BTTOrder" : 1
}
]