The rewards we have currently are cool but maybe something like the vote system could be added for getting crates or even 1-2 extra jobs, OR an even crazier idea a small rank coal, lapis or redstone for thousands of welcome points.
Here's an idea for some more rewards and maybe even more additions to pre-existing things
first we already have arrow trails, so why not add flying trails/elytra trails these being the same thing as the arrow trails but for when flying or using elytra. these could also have some additional effects, I'm gonna list some effects
Stars: Could leave a nether star like trail
Dragons Breath: This would be the purple dragons breath that the dragon does, but without hurting people
Withering: This could have 2 parts, 1 could be wither heads with the black wither effect while the 2nd could be just the wither effect
Ender Effect: The end portal effect would be neat seeing it through the air
These are some effects that could be added now onto jobs
This would be more expensive (of course) so maybe 1000 or 1,500 welcome points for 1 extra job (2,000 or 2.,500 for 2 jobs) These also wouldn't change the in-store jobs that would still add to it.
Next Ranks, these would be almost impossible to get through welcome points but still having them there could be neat
Coal Rank: This would probably be 5,000 welcome points going off of real money price around the original price would be good
Welcome Rank: Would be worse then Coal rank but be cheaper, say 3,000 welcome points but its got worse stuff then Coal rank
Lapis Rank: This would probably be 10,000 welcome points which is a lot
Last thing is the crates (I know I saved it for last)
Welcome Crates: These would be the same as vote crates and would cost 250 welcome points
Mythical Crates: These would be more expensive, and by a lot the price would be 1,000 welcome points
Doge Crates: Now these would be 5,000 welcome points
This is my opinion and the prices might need tweaked a bit but theres my idea