First off, thanks for the contribution! It is much appreciated!
It looks like you purchased the year-long ad removal option vs the silver donor option. I've included an image of the
account upgrades page below since I think it changes after you upgrade using one of the options.
If you meant to/would rather donate at the silver donor tier, PM me and I can refund the ad removal purchase, downgrade your account, and then you should be able to upgrade to the silver level.
As for other tiers, we don't know yet. When we had a similar system a few years ago we had $1, $2, and $3 per month options. We later removed the $1 per month tier because PayPal took so much out of it in fees that it basically didn't make any sense to have it. This time around we removed the $2 level because the overwhelming majority of donations previously were at the $3 per month level. If I remember correctly, only one person ever used the $2 option in fact and it was only for a brief period of time.
Since we saw little demand for levels below $3, it didn't seem worth the extra development and maintenance time and effort to continue offering them. That said, we still wanted to give people who hate ads a way to get rid of them for an amount closer to what we would make off of their pageviews. Hence, the $6 ad removal for a year option was born.