Buxify、Buxjunction 都可以"免费"升级，这里说的勉强是指可以用帐户里的钱升级为IRON会员。说明如下（两个站相同）：

（点击http://buxify.com/convert.php、http://buxjunction.com/convert.php 查看说明）

如果你的下线中有0位升级会员，那你的帐户里需要25美元才能升级为IRON；
如果你的下线中有1位升级会员，那你的帐户里需要20美元才能升级为IRON；
如果你的下线中有2位升级会员，那你的帐户里需要15美元才能升级为IRON；
如果你的下线中有3位升级会员，那你的帐户里需要10美元才能升级为IRON；
若你想免费升级,就不要充值升,只要有一次是充值升的,那么以后都要充值才能升,帐户内的钱无法用来升级。

免费升级需要联系站长手动升，方法：点击页面中的contact (范例如下)，请站长帮忙升级。
Subject写：Please help me upgrade to IRON membership
Message写：Hi admin,Please use my earnings to upgrade to IRON membership,Thanks!

网站原文说明：
Conversions

BUXJUNCTION is different from other similar websites.
The allowed daily cashout is automatically requested by the system
and You will only have to REQUEST your payment to processor to see your money grow!

Free members are not allowed to cashout with us; they can however:

    * convert their money to ADVERTISING here
    * convert their money to REFERRALS here
    * or use their earnings to UPGRADE.

Can I use my earnings to upgrade?
Yes, upon certain conditions. You must be a FREE member without any upgrade before the time of your request. In order to use your earnings to upgrade your membership You must also meet the following conditions:

- Free members with 3 upgraded members in downline can get an IRON upgrade if their account is over $10.00
- Free members with 2 upgraded members in downline can get an IRON upgrade if their account is over $15.00
- Free members with 1 upgraded member in downline can get an IRON upgrade if their account is over $20.00
- Free members with 0 upgraded members in downline can get an IRON upgrade if their account is over $25.00

Free members who meet the above conditions may contact us to request to be upgraded. This is a one time only condition and, if they have been already upgraded once, they will need to use their own cash to re-upgrade. The above terms may be modified by the BUXJUNCTION Administrator at any time